Merge branch 'compat' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 compat wrapper rework from Heiko Carstens:
 "S390 compat system call wrapper simplification work.

  The intention of this work is to get rid of all hand written assembly
  compat system call wrappers on s390, which perform proper sign or zero
  extension, or pointer conversion of compat system call parameters.
  Instead all of this should be done with C code eg by using Al's
  COMPAT_SYSCALL_DEFINEx() macro.

  Therefore all common code and s390 specific compat system calls have
  been converted to the COMPAT_SYSCALL_DEFINEx() macro.

  In order to generate correct code all compat system calls may only
  have eg compat_ulong_t parameters, but no unsigned long parameters.
  Those patches which change parameter types from unsigned long to
  compat_ulong_t parameters are separate in this series, but shouldn't
  cause any harm.

  The only compat system calls which intentionally have 64 bit
  parameters (preadv64 and pwritev64) in support of the x86/32 ABI
  haven't been changed, but are now only available if an architecture
  defines __ARCH_WANT_COMPAT_SYS_PREADV64/PWRITEV64.

  System calls which do not have a compat variant but still need proper
  zero extension on s390, like eg "long sys_brk(unsigned long brk)" will
  get a proper wrapper function with the new s390 specific
  COMPAT_SYSCALL_WRAPx() macro:

     COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);

  which generates the following code (simplified):

     asmlinkage long sys_brk(unsigned long brk);
     asmlinkage long compat_sys_brk(long brk)
     {
         return sys_brk((u32)brk);
     }

  Given that the C file which contains all the COMPAT_SYSCALL_WRAP lines
  includes both linux/syscall.h and linux/compat.h, it will generate
  build errors, if the declaration of sys_brk() doesn't match, or if
  there exists a non-matching compat_sys_brk() declaration.

  In addition this will intentionally result in a link error if
  somewhere else a compat_sys_brk() function exists, which probably
  should have been used instead.  Two more BUILD_BUG_ONs make sure the
  size and type of each compat syscall parameter can be handled
  correctly with the s390 specific macros.

  I converted the compat system calls step by step to verify the
  generated code is correct and matches the previous code.  In fact it
  did not always match, however that was always a bug in the hand
  written asm code.

  In result we get less code, less bugs, and much more sanity checking"

* 'compat' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (44 commits)
  s390/compat: add copyright statement
  compat: include linux/unistd.h within linux/compat.h
  s390/compat: get rid of compat wrapper assembly code
  s390/compat: build error for large compat syscall args
  mm/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  kexec/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  net/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  ipc/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  fs/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  ipc/compat: convert to COMPAT_SYSCALL_DEFINE
  fs/compat: convert to COMPAT_SYSCALL_DEFINE
  security/compat: convert to COMPAT_SYSCALL_DEFINE
  mm/compat: convert to COMPAT_SYSCALL_DEFINE
  net/compat: convert to COMPAT_SYSCALL_DEFINE
  kernel/compat: convert to COMPAT_SYSCALL_DEFINE
  fs/compat: optional preadv64/pwrite64 compat system calls
  ipc/compat_sys_msgrcv: change msgtyp type from long to compat_long_t
  s390/compat: partial parameter conversion within syscall wrappers
  s390/compat: automatic zero, sign and pointer conversion of syscalls
  s390/compat: add sync_file_range and fallocate compat syscalls
  ...

arch/arm64/include/asm/unistd.h

@@ -14,6 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_SYS_GETDENTS64
 #define __ARCH_WANT_COMPAT_STAT64
 #define __ARCH_WANT_SYS_GETHOSTNAME
 #define __ARCH_WANT_SYS_PAUSE

arch/mips/include/asm/unistd.h

@@ -24,7 +24,6 @@
 
 #ifndef __ASSEMBLY__
 
-#define __ARCH_OMIT_COMPAT_SYS_GETDENTS64
 #define __ARCH_WANT_OLD_READDIR
 #define __ARCH_WANT_SYS_ALARM
 #define __ARCH_WANT_SYS_GETHOSTNAME

arch/s390/include/asm/compat.h

@@ -8,7 +8,11 @@
 #include <linux/thread_info.h>
 
 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
-#define __SC_DELOUSE(t,v) (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v))
+
+#define __SC_DELOUSE(t,v) ({ \
+	BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
+	(t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
+})
 
 #define PSW32_MASK_PER		0x40000000UL
 #define PSW32_MASK_DAT		0x04000000UL

arch/s390/kernel/compat_linux.c

@@ -86,48 +86,51 @@
 #define SET_STAT_UID(stat, uid)		(stat).st_uid = high2lowuid(uid)
 #define SET_STAT_GID(stat, gid)		(stat).st_gid = high2lowgid(gid)
 
-asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
+COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
+		       u16, user, u16, group)
 {
 	return sys_chown(filename, low2highuid(user), low2highgid(group));
 }
 
-asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
+COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
+		       filename, u16, user, u16, group)
 {
 	return sys_lchown(filename, low2highuid(user), low2highgid(group));
 }
 
-asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
+COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
 {
 	return sys_fchown(fd, low2highuid(user), low2highgid(group));
 }
 
-asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
+COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
 {
 	return sys_setregid(low2highgid(rgid), low2highgid(egid));
 }
 
-asmlinkage long sys32_setgid16(u16 gid)
+COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
 {
 	return sys_setgid((gid_t)gid);
 }
 
-asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
+COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
 {
 	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
 }
 
-asmlinkage long sys32_setuid16(u16 uid)
+COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
 {
 	return sys_setuid((uid_t)uid);
 }
 
-asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
+COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
 {
 	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
-		low2highuid(suid));
+			     low2highuid(suid));
 }
 
-asmlinkage long sys32_getresuid16(u16 __user *ruidp, u16 __user *euidp, u16 __user *suidp)
+COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
+		       u16 __user *, euidp, u16 __user *, suidp)
 {
 	const struct cred *cred = current_cred();
 	int retval;
@@ -144,13 +147,14 @@ asmlinkage long sys32_getresuid16(u16 __user *ruidp, u16 __user *euidp, u16 __us
 	return retval;
 }
 
-asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
+COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
 {
 	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
-		low2highgid(sgid));
+			     low2highgid(sgid));
 }
 
-asmlinkage long sys32_getresgid16(u16 __user *rgidp, u16 __user *egidp, u16 __user *sgidp)
+COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
+		       u16 __user *, egidp, u16 __user *, sgidp)
 {
 	const struct cred *cred = current_cred();
 	int retval;
@@ -167,12 +171,12 @@ asmlinkage long sys32_getresgid16(u16 __user *rgidp, u16 __user *egidp, u16 __us
 	return retval;
 }
 
-asmlinkage long sys32_setfsuid16(u16 uid)
+COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
 {
 	return sys_setfsuid((uid_t)uid);
 }
 
-asmlinkage long sys32_setfsgid16(u16 gid)
+COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
 {
 	return sys_setfsgid((gid_t)gid);
 }
@@ -215,7 +219,7 @@ static int groups16_from_user(struct group_info *group_info, u16 __user *groupli
 	return 0;
 }
 
-asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
+COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
 {
 	const struct cred *cred = current_cred();
 	int i;
@@ -240,7 +244,7 @@ asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
 	return i;
 }
 
-asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
+COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
 {
 	struct group_info *group_info;
 	int retval;
@@ -265,22 +269,22 @@ asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 	return retval;
 }
 
-asmlinkage long sys32_getuid16(void)
+COMPAT_SYSCALL_DEFINE0(s390_getuid16)
 {
 	return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
 }
 
-asmlinkage long sys32_geteuid16(void)
+COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
 {
 	return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
 }
 
-asmlinkage long sys32_getgid16(void)
+COMPAT_SYSCALL_DEFINE0(s390_getgid16)
 {
 	return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
 }
 
-asmlinkage long sys32_getegid16(void)
+COMPAT_SYSCALL_DEFINE0(s390_getegid16)
 {
 	return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
 }
@@ -295,41 +299,35 @@ COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
 }
 #endif
 
-asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
+COMPAT_SYSCALL_DEFINE3(s390_truncate64, const char __user *, path, u32, high, u32, low)
 {
-	if ((int)high < 0)
-		return -EINVAL;
-	else
-		return sys_truncate(path, (high << 32) | low);
+	return sys_truncate(path, (unsigned long)high << 32 | low);
 }
 
-asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
+COMPAT_SYSCALL_DEFINE3(s390_ftruncate64, unsigned int, fd, u32, high, u32, low)
 {
-	if ((int)high < 0)
-		return -EINVAL;
-	else
-		return sys_ftruncate(fd, (high << 32) | low);
+	return sys_ftruncate(fd, (unsigned long)high << 32 | low);
 }
 
-asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
-				size_t count, u32 poshi, u32 poslo)
+COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf,
+		       compat_size_t, count, u32, high, u32, low)
 {
 	if ((compat_ssize_t) count < 0)
 		return -EINVAL;
-	return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
+	return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low);
 }
 
-asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
-				size_t count, u32 poshi, u32 poslo)
+COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf,
+		       compat_size_t, count, u32, high, u32, low)
 {
 	if ((compat_ssize_t) count < 0)
 		return -EINVAL;
-	return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
+	return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low);
 }
 
-asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
+COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count)
 {
-	return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
+	return sys_readahead(fd, (unsigned long)high << 32 | low, count);
 }
 
 struct stat64_emu31 {
@@ -381,7 +379,7 @@ static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
 	return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; 
 }
 
-asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
+COMPAT_SYSCALL_DEFINE2(s390_stat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
 {
 	struct kstat stat;
 	int ret = vfs_stat(filename, &stat);
@@ -390,7 +388,7 @@ asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 _
 	return ret;
 }
 
-asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
+COMPAT_SYSCALL_DEFINE2(s390_lstat64, const char __user *, filename, struct stat64_emu31 __user *, statbuf)
 {
 	struct kstat stat;
 	int ret = vfs_lstat(filename, &stat);
@@ -399,7 +397,7 @@ asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31
 	return ret;
 }
 
-asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
+COMPAT_SYSCALL_DEFINE2(s390_fstat64, unsigned int, fd, struct stat64_emu31 __user *, statbuf)
 {
 	struct kstat stat;
 	int ret = vfs_fstat(fd, &stat);
@@ -408,8 +406,8 @@ asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * sta
 	return ret;
 }
 
-asmlinkage long sys32_fstatat64(unsigned int dfd, const char __user *filename,
-				struct stat64_emu31 __user* statbuf, int flag)
+COMPAT_SYSCALL_DEFINE4(s390_fstatat64, unsigned int, dfd, const char __user *, filename,
+		       struct stat64_emu31 __user *, statbuf, int, flag)
 {
 	struct kstat stat;
 	int error;
@@ -435,7 +433,7 @@ struct mmap_arg_struct_emu31 {
 	compat_ulong_t offset;
 };
 
-asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
+COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg)
 {
 	struct mmap_arg_struct_emu31 a;
 
@@ -447,7 +445,7 @@ asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
 			      a.offset >> PAGE_SHIFT);
 }
 
-asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
+COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg)
 {
 	struct mmap_arg_struct_emu31 a;
 
@@ -456,7 +454,7 @@ asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
 	return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
 }
 
-asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
+COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count)
 {
 	if ((compat_ssize_t) count < 0)
 		return -EINVAL; 
@@ -464,7 +462,7 @@ asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
 	return sys_read(fd, buf, count);
 }
 
-asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t count)
+COMPAT_SYSCALL_DEFINE3(s390_write, unsigned int, fd, const char __user *, buf, compat_size_t, count)
 {
 	if ((compat_ssize_t) count < 0)
 		return -EINVAL; 
@@ -478,14 +476,13 @@ asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t cou
  * because the 31 bit values differ from the 64 bit values.
  */
 
-asmlinkage long
-sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
+COMPAT_SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, high, u32, low, compat_size_t, len, int, advise)
 {
 	if (advise == 4)
 		advise = POSIX_FADV_DONTNEED;
 	else if (advise == 5)
 		advise = POSIX_FADV_NOREUSE;
-	return sys_fadvise64(fd, offset, len, advise);
+	return sys_fadvise64(fd, (unsigned long)high << 32 | low, len, advise);
 }
 
 struct fadvise64_64_args {
@@ -495,8 +492,7 @@ struct fadvise64_64_args {
 	int advice;
 };
 
-asmlinkage long
-sys32_fadvise64_64(struct fadvise64_64_args __user *args)
+COMPAT_SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
 {
 	struct fadvise64_64_args a;
 
@@ -508,3 +504,17 @@ sys32_fadvise64_64(struct fadvise64_64_args __user *args)
 		a.advice = POSIX_FADV_NOREUSE;
 	return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
 }
+
+COMPAT_SYSCALL_DEFINE6(s390_sync_file_range, int, fd, u32, offhigh, u32, offlow,
+		       u32, nhigh, u32, nlow, unsigned int, flags)
+{
+	return sys_sync_file_range(fd, ((loff_t)offhigh << 32) + offlow,
+				   ((u64)nhigh << 32) + nlow, flags);
+}
+
+COMPAT_SYSCALL_DEFINE6(s390_fallocate, int, fd, int, mode, u32, offhigh, u32, offlow,
+		       u32, lenhigh, u32, lenlow)
+{
+	return sys_fallocate(fd, mode, ((loff_t)offhigh << 32) + offlow,
+			     ((u64)lenhigh << 32) + lenlow);
+}

arch/s390/kernel/compat_linux.h

@@ -76,46 +76,43 @@ struct stat64_emu31;
 struct mmap_arg_struct_emu31;
 struct fadvise64_64_args;
 
-long sys32_chown16(const char __user * filename, u16 user, u16 group);
-long sys32_lchown16(const char __user * filename, u16 user, u16 group);
-long sys32_fchown16(unsigned int fd, u16 user, u16 group);
-long sys32_setregid16(u16 rgid, u16 egid);
-long sys32_setgid16(u16 gid);
-long sys32_setreuid16(u16 ruid, u16 euid);
-long sys32_setuid16(u16 uid);
-long sys32_setresuid16(u16 ruid, u16 euid, u16 suid);
-long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid);
-long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid);
-long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid);
-long sys32_setfsuid16(u16 uid);
-long sys32_setfsgid16(u16 gid);
-long sys32_getgroups16(int gidsetsize, u16 __user *grouplist);
-long sys32_setgroups16(int gidsetsize, u16 __user *grouplist);
-long sys32_getuid16(void);
-long sys32_geteuid16(void);
-long sys32_getgid16(void);
-long sys32_getegid16(void);
-long sys32_truncate64(const char __user * path, unsigned long high,
-		      unsigned long low);
-long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low);
-long sys32_init_module(void __user *umod, unsigned long len,
-		       const char __user *uargs);
-long sys32_delete_module(const char __user *name_user, unsigned int flags);
-long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count,
-		   u32 poshi, u32 poslo);
-long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
-		    size_t count, u32 poshi, u32 poslo);
-compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count);
-long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf);
-long sys32_lstat64(const char __user * filename,
-		   struct stat64_emu31 __user * statbuf);
-long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf);
-long sys32_fstatat64(unsigned int dfd, const char __user *filename,
-		     struct stat64_emu31 __user* statbuf, int flag);
-unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg);
-long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg);
-long sys32_read(unsigned int fd, char __user * buf, size_t count);
-long sys32_write(unsigned int fd, const char __user * buf, size_t count);
-long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
-long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
+long compat_sys_s390_chown16(const char __user *filename, u16 user, u16 group);
+long compat_sys_s390_lchown16(const char __user *filename, u16 user, u16 group);
+long compat_sys_s390_fchown16(unsigned int fd, u16 user, u16 group);
+long compat_sys_s390_setregid16(u16 rgid, u16 egid);
+long compat_sys_s390_setgid16(u16 gid);
+long compat_sys_s390_setreuid16(u16 ruid, u16 euid);
+long compat_sys_s390_setuid16(u16 uid);
+long compat_sys_s390_setresuid16(u16 ruid, u16 euid, u16 suid);
+long compat_sys_s390_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid);
+long compat_sys_s390_setresgid16(u16 rgid, u16 egid, u16 sgid);
+long compat_sys_s390_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid);
+long compat_sys_s390_setfsuid16(u16 uid);
+long compat_sys_s390_setfsgid16(u16 gid);
+long compat_sys_s390_getgroups16(int gidsetsize, u16 __user *grouplist);
+long compat_sys_s390_setgroups16(int gidsetsize, u16 __user *grouplist);
+long compat_sys_s390_getuid16(void);
+long compat_sys_s390_geteuid16(void);
+long compat_sys_s390_getgid16(void);
+long compat_sys_s390_getegid16(void);
+long compat_sys_s390_truncate64(const char __user *path, u32 high, u32 low);
+long compat_sys_s390_ftruncate64(unsigned int fd, u32 high, u32 low);
+long compat_sys_s390_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, u32 high, u32 low);
+long compat_sys_s390_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count, u32 high, u32 low);
+long compat_sys_s390_readahead(int fd, u32 high, u32 low, s32 count);
+long compat_sys_s390_stat64(const char __user *filename, struct stat64_emu31 __user *statbuf);
+long compat_sys_s390_lstat64(const char __user *filename, struct stat64_emu31 __user *statbuf);
+long compat_sys_s390_fstat64(unsigned int fd, struct stat64_emu31 __user *statbuf);
+long compat_sys_s390_fstatat64(unsigned int dfd, const char __user *filename, struct stat64_emu31 __user *statbuf, int flag);
+long compat_sys_s390_old_mmap(struct mmap_arg_struct_emu31 __user *arg);
+long compat_sys_s390_mmap2(struct mmap_arg_struct_emu31 __user *arg);
+long compat_sys_s390_read(unsigned int fd, char __user * buf, compat_size_t count);
+long compat_sys_s390_write(unsigned int fd, const char __user * buf, compat_size_t count);
+long compat_sys_s390_fadvise64(int fd, u32 high, u32 low, compat_size_t len, int advise);
+long compat_sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
+long compat_sys_s390_sync_file_range(int fd, u32 offhigh, u32 offlow, u32 nhigh, u32 nlow, unsigned int flags);
+long compat_sys_s390_fallocate(int fd, int mode, u32 offhigh, u32 offlow, u32 lenhigh, u32 lenlow);
+long compat_sys_sigreturn(void);
+long compat_sys_rt_sigreturn(void);
+
 #endif /* _ASM_S390X_S390_H */

arch/s390/kernel/compat_signal.c

@@ -241,7 +241,7 @@ static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs)
 	return 0;
 }
 
-asmlinkage long sys32_sigreturn(void)
+COMPAT_SYSCALL_DEFINE0(sigreturn)
 {
 	struct pt_regs *regs = task_pt_regs(current);
 	sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
@@ -260,7 +260,7 @@ asmlinkage long sys32_sigreturn(void)
 	return 0;
 }
 
-asmlinkage long sys32_rt_sigreturn(void)
+COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
 {
 	struct pt_regs *regs = task_pt_regs(current);
 	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];

arch/s390/kernel/compat_wrapper.c

+/*
+ *  Compat sytem call wrappers.
+ *
+ *    Copyright IBM Corp. 2014
+ */
+
+#include <linux/syscalls.h>
+#include <linux/compat.h>
+#include "entry.h"
+
+#define COMPAT_SYSCALL_WRAP1(name, ...) \
+	COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP2(name, ...) \
+	COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP3(name, ...) \
+	COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP4(name, ...) \
+	COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP5(name, ...) \
+	COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP6(name, ...) \
+	COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
+
+#define __SC_COMPAT_TYPE(t, a) \
+	__typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
+
+#define __SC_COMPAT_CAST(t, a)						\
+({									\
+	long __ReS = a;							\
+									\
+	BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) &&		\
+		     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t));		\
+	if (__TYPE_IS_L(t))						\
+		__ReS = (s32)a;						\
+	if (__TYPE_IS_UL(t))						\
+		__ReS = (u32)a;						\
+	if (__TYPE_IS_PTR(t))						\
+		__ReS = a & 0x7fffffff;					\
+	(t)__ReS;							\
+})
+
+/*
+ * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
+ * compat tasks. These wrappers will only be used for system calls where only
+ * the system call arguments need sign or zero extension or zeroing of the upper
+ * 33 bits of pointers.
+ * Note: since the wrapper function will afterwards call a system call which
+ * again performs zero and sign extension for all system call arguments with
+ * a size of less than eight bytes, these compat wrappers only touch those
+ * system call arguments with a size of eight bytes ((unsigned) long and
+ * pointers). Zero and sign extension for e.g. int parameters will be done by
+ * the regular system call wrappers.
+ */
+#define COMPAT_SYSCALL_WRAPx(x, name, ...)					\
+	asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));		\
+	asmlinkage long compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
+	asmlinkage long compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__))	\
+	{									\
+		return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__));	\
+	}
+
+COMPAT_SYSCALL_WRAP1(exit, int, error_code);
+COMPAT_SYSCALL_WRAP1(close, unsigned int, fd);
+COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
+COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
+COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
+COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
+COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
+COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
+COMPAT_SYSCALL_WRAP1(alarm, unsigned int, seconds);
+COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
+COMPAT_SYSCALL_WRAP1(nice, int, increment);
+COMPAT_SYSCALL_WRAP2(kill, int, pid, int, sig);
+COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
+COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
+COMPAT_SYSCALL_WRAP1(dup, unsigned int, fildes);
+COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
+COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
+COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
+COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
+COMPAT_SYSCALL_WRAP2(setpgid, pid_t, pid, pid_t, pgid);
+COMPAT_SYSCALL_WRAP1(umask, int, mask);
+COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
+COMPAT_SYSCALL_WRAP2(dup2, unsigned int, oldfd, unsigned int, newfd);
+COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
+COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
+COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
+COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
+COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
+COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
+COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
+COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
+COMPAT_SYSCALL_WRAP2(fchmod, unsigned int, fd, umode_t, mode);
+COMPAT_SYSCALL_WRAP2(getpriority, int, which, int, who);
+COMPAT_SYSCALL_WRAP3(setpriority, int, which, int, who, int, niceval);
+COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
+COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
+COMPAT_SYSCALL_WRAP1(fsync, unsigned int, fd);
+COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
+COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
+COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
+COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
+COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
+COMPAT_SYSCALL_WRAP1(getpgid, pid_t, pid);
+COMPAT_SYSCALL_WRAP1(fchdir, unsigned int, fd);
+COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
+COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
+COMPAT_SYSCALL_WRAP1(s390_personality, unsigned int, personality);
+COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
+COMPAT_SYSCALL_WRAP2(flock, unsigned int, fd, unsigned int, cmd);
+COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
+COMPAT_SYSCALL_WRAP1(getsid, pid_t, pid);
+COMPAT_SYSCALL_WRAP1(fdatasync, unsigned int, fd);
+COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
+COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
+COMPAT_SYSCALL_WRAP1(mlockall, int, flags);
+COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP1(sched_getscheduler, pid_t, pid);
+COMPAT_SYSCALL_WRAP1(sched_get_priority_max, int, policy);
+COMPAT_SYSCALL_WRAP1(sched_get_priority_min, int, policy);
+COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
+COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
+COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
+COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
+COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
+COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
+COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
+COMPAT_SYSCALL_WRAP2(setreuid, uid_t, ruid, uid_t, euid);
+COMPAT_SYSCALL_WRAP2(setregid, gid_t, rgid, gid_t, egid);
+COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
+COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
+COMPAT_SYSCALL_WRAP3(fchown, unsigned int, fd, uid_t, user, gid_t, group);
+COMPAT_SYSCALL_WRAP3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid);
+COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
+COMPAT_SYSCALL_WRAP3(setresgid, gid_t, rgid, gid_t, egid, gid_t, sgid);
+COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
+COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
+COMPAT_SYSCALL_WRAP1(setuid, uid_t, uid);
+COMPAT_SYSCALL_WRAP1(setgid, gid_t, gid);
+COMPAT_SYSCALL_WRAP1(setfsuid, uid_t, uid);
+COMPAT_SYSCALL_WRAP1(setfsgid, gid_t, gid);
+COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
+COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
+COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
+COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
+COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
+COMPAT_SYSCALL_WRAP1(exit_group, int, error_code);
+COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
+COMPAT_SYSCALL_WRAP1(epoll_create, int, size);
+COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
+COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
+COMPAT_SYSCALL_WRAP1(timer_getoverrun, timer_t, timer_id);
+COMPAT_SYSCALL_WRAP1(timer_delete, compat_timer_t, compat_timer_id);
+COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
+COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
+COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
+COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
+COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
+COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
+COMPAT_SYSCALL_WRAP3(ioprio_set, int, which, int, who, int, ioprio);
+COMPAT_SYSCALL_WRAP2(ioprio_get, int, which, int, who);
+COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
+COMPAT_SYSCALL_WRAP2(inotify_rm_watch, int, fd, __s32, wd);
+COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
+COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
+COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
+COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
+COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
+COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
+COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
+COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
+COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
+COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
+COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
+COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
+COMPAT_SYSCALL_WRAP1(eventfd, unsigned int, count);
+COMPAT_SYSCALL_WRAP2(timerfd_create, int, clockid, int, flags);
+COMPAT_SYSCALL_WRAP2(eventfd2, unsigned int, count, int, flags);
+COMPAT_SYSCALL_WRAP1(inotify_init1, int, flags);
+COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
+COMPAT_SYSCALL_WRAP3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags);
+COMPAT_SYSCALL_WRAP1(epoll_create1, int, flags);
+COMPAT_SYSCALL_WRAP2(tkill, int, pid, int, sig);
+COMPAT_SYSCALL_WRAP3(tgkill, int, tgid, int, pid, int, sig);
+COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
+COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, int, tls_val);
+COMPAT_SYSCALL_WRAP2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags);
+COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
+COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
+COMPAT_SYSCALL_WRAP1(syncfs, int, fd);
+COMPAT_SYSCALL_WRAP2(setns, int, fd, int, nstype);
+COMPAT_SYSCALL_WRAP2(s390_runtime_instr, int, command, int, signum);
+COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
+COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
+COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);

arch/s390/kernel/entry.h

@@ -67,9 +67,7 @@ struct s390_mmap_arg_struct;
 struct fadvise64_64_args;
 struct old_sigaction;
 
-long sys_sigreturn(void);
-long sys_rt_sigreturn(void);
-long sys32_sigreturn(void);
-long sys32_rt_sigreturn(void);
+long sys_s390_personality(unsigned int personality);
+long sys_s390_runtime_instr(int command, int signum);
 
 #endif /* _ENTRY_H */

arch/x86/include/asm/unistd.h

@@ -23,6 +23,9 @@
 #  include <asm/unistd_64.h>
 #  include <asm/unistd_64_x32.h>
 #  define __ARCH_WANT_COMPAT_SYS_TIME
+#  define __ARCH_WANT_COMPAT_SYS_GETDENTS64
+#  define __ARCH_WANT_COMPAT_SYS_PREADV64
+#  define __ARCH_WANT_COMPAT_SYS_PWRITEV64
 
 # endif
 

fs/compat.c

@@ -72,8 +72,8 @@ int compat_printk(const char *fmt, ...)
  * Not all architectures have sys_utime, so implement this in terms
  * of sys_utimes.
  */
-asmlinkage long compat_sys_utime(const char __user *filename,
-				 struct compat_utimbuf __user *t)
+COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
+		       struct compat_utimbuf __user *, t)
 {
 	struct timespec tv[2];
 
@@ -87,7 +87,7 @@ asmlinkage long compat_sys_utime(const char __user *filename,
 	return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
 }
 
-asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
+COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct compat_timespec __user *, t, int, flags)
 {
 	struct timespec tv[2];
 
@@ -102,7 +102,7 @@ asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filena
 	return do_utimes(dfd, filename, t ? tv : NULL, flags);
 }
 
-asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
+COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd, const char __user *, filename, struct compat_timeval __user *, t)
 {
 	struct timespec tv[2];
 
@@ -121,7 +121,7 @@ asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filena
 	return do_utimes(dfd, filename, t ? tv : NULL, 0);
 }
 
-asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
+COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct compat_timeval __user *, t)
 {
 	return compat_sys_futimesat(AT_FDCWD, filename, t);
 }
@@ -159,8 +159,8 @@ static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
 	return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
 }
 
-asmlinkage long compat_sys_newstat(const char __user * filename,
-		struct compat_stat __user *statbuf)
+COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
+		       struct compat_stat __user *, statbuf)
 {
 	struct kstat stat;
 	int error;
@@ -171,8 +171,8 @@ asmlinkage long compat_sys_newstat(const char __user * filename,
 	return cp_compat_stat(&stat, statbuf);
 }
 
-asmlinkage long compat_sys_newlstat(const char __user * filename,
-		struct compat_stat __user *statbuf)
+COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename,
+		       struct compat_stat __user *, statbuf)
 {
 	struct kstat stat;
 	int error;
@@ -184,9 +184,9 @@ asmlinkage long compat_sys_newlstat(const char __user * filename,
 }
 
 #ifndef __ARCH_WANT_STAT64
-asmlinkage long compat_sys_newfstatat(unsigned int dfd,
-		const char __user *filename,
-		struct compat_stat __user *statbuf, int flag)
+COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd,
+		       const char __user *, filename,
+		       struct compat_stat __user *, statbuf, int, flag)
 {
 	struct kstat stat;
 	int error;
@@ -198,8 +198,8 @@ asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 }
 #endif
 
-asmlinkage long compat_sys_newfstat(unsigned int fd,
-		struct compat_stat __user * statbuf)
+COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
+		       struct compat_stat __user *, statbuf)
 {
 	struct kstat stat;
 	int error = vfs_fstat(fd, &stat);
@@ -247,7 +247,7 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
  * The following statfs calls are copies of code from fs/statfs.c and
  * should be checked against those from time to time
  */
-asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
+COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
 {
 	struct kstatfs tmp;
 	int error = user_statfs(pathname, &tmp);
@@ -256,7 +256,7 @@ asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_sta
 	return error;
 }
 
-asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
+COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
 {
 	struct kstatfs tmp;
 	int error = fd_statfs(fd, &tmp);
@@ -298,7 +298,7 @@ static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstat
 	return 0;
 }
 
-asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
+COMPAT_SYSCALL_DEFINE3(statfs64, const char __user *, pathname, compat_size_t, sz, struct compat_statfs64 __user *, buf)
 {
 	struct kstatfs tmp;
 	int error;
@@ -312,7 +312,7 @@ asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t s
 	return error;
 }
 
-asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
+COMPAT_SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, compat_size_t, sz, struct compat_statfs64 __user *, buf)
 {
 	struct kstatfs tmp;
 	int error;
@@ -331,7 +331,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c
  * Given how simple this syscall is that apporach is more maintainable
  * than the various conversion hacks.
  */
-asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
+COMPAT_SYSCALL_DEFINE2(ustat, unsigned, dev, struct compat_ustat __user *, u)
 {
 	struct compat_ustat tmp;
 	struct kstatfs sbuf;
@@ -399,8 +399,8 @@ static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *u
 }
 #endif
 
-asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
-		unsigned long arg)
+COMPAT_SYSCALL_DEFINE3(fcntl64, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg)
 {
 	mm_segment_t old_fs;
 	struct flock f;
@@ -468,16 +468,15 @@ asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 	return ret;
 }
 
-asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
-		unsigned long arg)
+COMPAT_SYSCALL_DEFINE3(fcntl, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg)
 {
 	if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
 		return -EINVAL;
 	return compat_sys_fcntl64(fd, cmd, arg);
 }
 
-asmlinkage long
-compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
+COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_reqs, u32 __user *, ctx32p)
 {
 	long ret;
 	aio_context_t ctx64;
@@ -496,32 +495,24 @@ compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
 	return ret;
 }
 
-asmlinkage long
-compat_sys_io_getevents(aio_context_t ctx_id,
-				 unsigned long min_nr,
-				 unsigned long nr,
-				 struct io_event __user *events,
-				 struct compat_timespec __user *timeout)
+COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id,
+		       compat_long_t, min_nr,
+		       compat_long_t, nr,
+		       struct io_event __user *, events,
+		       struct compat_timespec __user *, timeout)
 {
-	long ret;
 	struct timespec t;
 	struct timespec __user *ut = NULL;
 
-	ret = -EFAULT;
-	if (unlikely(!access_ok(VERIFY_WRITE, events, 
-				nr * sizeof(struct io_event))))
-		goto out;
 	if (timeout) {
 		if (get_compat_timespec(&t, timeout))
-			goto out;
+			return -EFAULT;
 
 		ut = compat_alloc_user_space(sizeof(*ut));
 		if (copy_to_user(ut, &t, sizeof(t)) )
-			goto out;
+			return -EFAULT;
 	} 
-	ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
-out:
-	return ret;
+	return sys_io_getevents(ctx_id, min_nr, nr, events, ut);
 }
 
 /* A write operation does a read from user space and vice versa */
@@ -617,8 +608,8 @@ copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
 
 #define MAX_AIO_SUBMITS 	(PAGE_SIZE/sizeof(struct iocb *))
 
-asmlinkage long
-compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
+COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id,
+		       int, nr, u32 __user *, iocb)
 {
 	struct iocb __user * __user *iocb64; 
 	long ret;
@@ -770,10 +761,10 @@ static int do_nfs4_super_data_conv(void *raw_data)
 #define NCPFS_NAME      "ncpfs"
 #define NFS4_NAME	"nfs4"
 
-asmlinkage long compat_sys_mount(const char __user * dev_name,
-				 const char __user * dir_name,
-				 const char __user * type, unsigned long flags,
-				 const void __user * data)
+COMPAT_SYSCALL_DEFINE5(mount, const char __user *, dev_name,
+		       const char __user *, dir_name,
+		       const char __user *, type, compat_ulong_t, flags,
+		       const void __user *, data)
 {
 	char *kernel_type;
 	unsigned long data_page;
@@ -869,8 +860,8 @@ static int compat_fillonedir(void *__buf, const char *name, int namlen,
 	return -EFAULT;
 }
 
-asmlinkage long compat_sys_old_readdir(unsigned int fd,
-	struct compat_old_linux_dirent __user *dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
+		struct compat_old_linux_dirent __user *, dirent, unsigned int, count)
 {
 	int error;
 	struct fd f = fdget(fd);
@@ -948,8 +939,8 @@ static int compat_filldir(void *__buf, const char *name, int namlen,
 	return -EFAULT;
 }
 
-asmlinkage long compat_sys_getdents(unsigned int fd,
-		struct compat_linux_dirent __user *dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
+		struct compat_linux_dirent __user *, dirent, unsigned int, count)
 {
 	struct fd f;
 	struct compat_linux_dirent __user * lastdirent;
@@ -981,7 +972,7 @@ asmlinkage long compat_sys_getdents(unsigned int fd,
 	return error;
 }
 
-#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
+#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
 
 struct compat_getdents_callback64 {
 	struct dir_context ctx;
@@ -1033,8 +1024,8 @@ static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t
 	return -EFAULT;
 }
 
-asmlinkage long compat_sys_getdents64(unsigned int fd,
-		struct linux_dirent64 __user * dirent, unsigned int count)
+COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd,
+		struct linux_dirent64 __user *, dirent, unsigned int, count)
 {
 	struct fd f;
 	struct linux_dirent64 __user * lastdirent;
@@ -1066,7 +1057,7 @@ asmlinkage long compat_sys_getdents64(unsigned int fd,
 	fdput(f);
 	return error;
 }
-#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
+#endif /* __ARCH_WANT_COMPAT_SYS_GETDENTS64 */
 
 /*
  * Exactly like fs/open.c:sys_open(), except that it doesn't set the
@@ -1287,9 +1278,9 @@ int compat_core_sys_select(int n, compat_ulong_t __user *inp,
 	return ret;
 }
 
-asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
-	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
-	struct compat_timeval __user *tvp)
+COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,
+	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+	struct compat_timeval __user *, tvp)
 {
 	struct timespec end_time, *to = NULL;
 	struct compat_timeval tv;
@@ -1320,7 +1311,7 @@ struct compat_sel_arg_struct {
 	compat_uptr_t tvp;
 };
 
-asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
+COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg)
 {
 	struct compat_sel_arg_struct a;
 
@@ -1381,9 +1372,9 @@ static long do_compat_pselect(int n, compat_ulong_t __user *inp,
 	return ret;
 }
 
-asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
-	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
-	struct compat_timespec __user *tsp, void __user *sig)
+COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
+	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
+	struct compat_timespec __user *, tsp, void __user *, sig)
 {
 	compat_size_t sigsetsize = 0;
 	compat_uptr_t up = 0;
@@ -1400,9 +1391,9 @@ asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 				 sigsetsize);
 }
 
-asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
-	unsigned int nfds, struct compat_timespec __user *tsp,
-	const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
+COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
+	unsigned int,  nfds, struct compat_timespec __user *, tsp,
+	const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
 {
 	compat_sigset_t ss32;
 	sigset_t ksigmask, sigsaved;

fs/compat_ioctl.c

@@ -1538,9 +1538,10 @@ static int compat_ioctl_check_table(unsigned int xcmd)
 	return ioctl_pointer[i] == xcmd;
 }
 
-asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
-				unsigned long arg)
+COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
+		       compat_ulong_t, arg32)
 {
+	unsigned long arg = arg32;
 	struct fd f = fdget(fd);
 	int error = -EBADF;
 	if (!f.file)

fs/exec.c

@@ -1619,9 +1619,9 @@ SYSCALL_DEFINE3(execve,
 	return do_execve(getname(filename), argv, envp);
 }
 #ifdef CONFIG_COMPAT
-asmlinkage long compat_sys_execve(const char __user * filename,
-	const compat_uptr_t __user * argv,
-	const compat_uptr_t __user * envp)
+COMPAT_SYSCALL_DEFINE3(execve, const char __user *, filename,
+	const compat_uptr_t __user *, argv,
+	const compat_uptr_t __user *, envp)
 {
 	return compat_do_execve(getname(filename), argv, envp);
 }

fs/read_write.c

@@ -994,9 +994,9 @@ COMPAT_SYSCALL_DEFINE3(readv, compat_ulong_t, fd,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd,
-		const struct compat_iovec __user *,vec,
-		unsigned long, vlen, loff_t, pos)
+static long __compat_sys_preadv64(unsigned long fd,
+				  const struct compat_iovec __user *vec,
+				  unsigned long vlen, loff_t pos)
 {
 	struct fd f;
 	ssize_t ret;
@@ -1013,12 +1013,22 @@ COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd,
 	return ret;
 }
 
+#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
+COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd,
+		const struct compat_iovec __user *,vec,
+		unsigned long, vlen, loff_t, pos)
+{
+	return __compat_sys_preadv64(fd, vec, vlen, pos);
+}
+#endif
+
 COMPAT_SYSCALL_DEFINE5(preadv, compat_ulong_t, fd,
 		const struct compat_iovec __user *,vec,
 		compat_ulong_t, vlen, u32, pos_low, u32, pos_high)
 {
 	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
-	return compat_sys_preadv64(fd, vec, vlen, pos);
+
+	return __compat_sys_preadv64(fd, vec, vlen, pos);
 }
 
 static size_t compat_writev(struct file *file,
@@ -1061,9 +1071,9 @@ COMPAT_SYSCALL_DEFINE3(writev, compat_ulong_t, fd,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd,
-		const struct compat_iovec __user *,vec,
-		unsigned long, vlen, loff_t, pos)
+static long __compat_sys_pwritev64(unsigned long fd,
+				   const struct compat_iovec __user *vec,
+				   unsigned long vlen, loff_t pos)
 {
 	struct fd f;
 	ssize_t ret;
@@ -1080,12 +1090,22 @@ COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd,
 	return ret;
 }
 
+#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
+COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd,
+		const struct compat_iovec __user *,vec,
+		unsigned long, vlen, loff_t, pos)
+{
+	return __compat_sys_pwritev64(fd, vec, vlen, pos);
+}
+#endif
+
 COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd,
 		const struct compat_iovec __user *,vec,
 		compat_ulong_t, vlen, u32, pos_low, u32, pos_high)
 {
 	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
-	return compat_sys_pwritev64(fd, vec, vlen, pos);
+
+	return __compat_sys_pwritev64(fd, vec, vlen, pos);
 }
 #endif
 

include/linux/compat.h

@@ -14,6 +14,7 @@
 #include <linux/if.h>
 #include <linux/fs.h>
 #include <linux/aio_abi.h>	/* for aio_context_t */
+#include <linux/unistd.h>
 
 #include <asm/compat.h>
 #include <asm/siginfo.h>
@@ -27,6 +28,9 @@
 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
 #endif
 
+#define COMPAT_SYSCALL_DEFINE0(name) \
+	asmlinkage long compat_sys_##name(void)
+
 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
@@ -68,6 +72,8 @@ typedef struct compat_sigaltstack {
 typedef __compat_uid32_t	compat_uid_t;
 typedef __compat_gid32_t	compat_gid_t;
 
+typedef	compat_ulong_t		compat_aio_context_t;
+
 struct compat_sel_arg_struct;
 struct rusage;
 
@@ -318,7 +324,7 @@ asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 		compat_ssize_t msgsz, int msgflg);
 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
-		compat_ssize_t msgsz, long msgtyp, int msgflg);
+		compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 long compat_sys_msgctl(int first, int second, void __user *uptr);
 long compat_sys_shmctl(int first, int second, void __user *uptr);
 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
@@ -337,6 +343,19 @@ asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 		const struct compat_iovec __user *vec,
 		compat_ulong_t vlen, u32 pos_low, u32 pos_high);
+
+#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
+asmlinkage long compat_sys_preadv64(unsigned long fd,
+		const struct compat_iovec __user *vec,
+		unsigned long vlen, loff_t pos);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
+asmlinkage long compat_sys_pwritev64(unsigned long fd,
+		const struct compat_iovec __user *vec,
+		unsigned long vlen, loff_t pos);
+#endif
+
 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 
 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
@@ -451,7 +470,7 @@ asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 				   struct compat_itimerspec __user *otmr);
 
-asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
+asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 				      __u32 __user *pages,
 				      const int __user *nodes,
 				      int __user *status,
@@ -481,20 +500,20 @@ asmlinkage long compat_sys_statfs64(const char __user *pathname,
 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 				     struct compat_statfs64 __user *buf);
 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
-				   unsigned long arg);
+				   compat_ulong_t arg);
 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
-				 unsigned long arg);
+				 compat_ulong_t arg);
 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
-asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
-					unsigned long min_nr,
-					unsigned long nr,
+asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
+					compat_long_t min_nr,
+					compat_long_t nr,
 					struct io_event __user *events,
 					struct compat_timespec __user *timeout);
-asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
+asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 				     u32 __user *iocb);
 asmlinkage long compat_sys_mount(const char __user *dev_name,
 				 const char __user *dir_name,
-				 const char __user *type, unsigned long flags,
+				 const char __user *type, compat_ulong_t flags,
 				 const void __user *data);
 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 				       struct compat_old_linux_dirent __user *,
@@ -502,9 +521,11 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd,
 asmlinkage long compat_sys_getdents(unsigned int fd,
 				    struct compat_linux_dirent __user *dirent,
 				    unsigned int count);
+#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
 asmlinkage long compat_sys_getdents64(unsigned int fd,
 				      struct linux_dirent64 __user *dirent,
 				      unsigned int count);
+#endif
 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 				    unsigned int nr_segs, unsigned int flags);
 asmlinkage long compat_sys_open(const char __user *filename, int flags,
@@ -549,9 +570,9 @@ asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 				    unsigned vlen, unsigned int flags);
 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 				   unsigned int flags);
-asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
+asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 				unsigned flags);
-asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
+asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 			    unsigned flags, struct sockaddr __user *addr,
 			    int __user *addrlen);
 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
@@ -615,16 +636,16 @@ asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 				struct compat_siginfo __user *uinfo);
 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
-				 unsigned long arg);
+				 compat_ulong_t arg);
 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 		struct compat_timespec __user *utime, u32 __user *uaddr2,
 		u32 val3);
 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 				      char __user *optval, int __user *optlen);
-asmlinkage long compat_sys_kexec_load(unsigned long entry,
-				      unsigned long nr_segments,
+asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
+				      compat_ulong_t nr_segments,
 				      struct compat_kexec_segment __user *,
-				      unsigned long flags);
+				      compat_ulong_t flags);
 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 			const struct compat_mq_attr __user *u_mqstat,
 			struct compat_mq_attr __user *u_omqstat);
@@ -635,11 +656,11 @@ asmlinkage long compat_sys_mq_open(const char __user *u_name,
 			struct compat_mq_attr __user *u_attr);
 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 			const char __user *u_msg_ptr,
-			size_t msg_len, unsigned int msg_prio,
+			compat_size_t msg_len, unsigned int msg_prio,
 			const struct compat_timespec __user *u_abs_timeout);
 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 			char __user *u_msg_ptr,
-			size_t msg_len, unsigned int __user *u_msg_prio,
+			compat_size_t msg_len, unsigned int __user *u_msg_prio,
 			const struct compat_timespec __user *u_abs_timeout);
 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
@@ -654,12 +675,12 @@ extern void __user *compat_alloc_user_space(unsigned long len);
 
 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 		const struct compat_iovec __user *lvec,
-		unsigned long liovcnt, const struct compat_iovec __user *rvec,
-		unsigned long riovcnt, unsigned long flags);
+		compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
+		compat_ulong_t riovcnt, compat_ulong_t flags);
 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 		const struct compat_iovec __user *lvec,
-		unsigned long liovcnt, const struct compat_iovec __user *rvec,
-		unsigned long riovcnt, unsigned long flags);
+		compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
+		compat_ulong_t riovcnt, compat_ulong_t flags);
 
 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 				    compat_off_t __user *offset, compat_size_t count);

include/linux/kexec.h

@@ -127,12 +127,6 @@ extern asmlinkage long sys_kexec_load(unsigned long entry,
 					struct kexec_segment __user *segments,
 					unsigned long flags);
 extern int kernel_kexec(void);
-#ifdef CONFIG_COMPAT
-extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
-				unsigned long nr_segments,
-				struct compat_kexec_segment __user *segments,
-				unsigned long flags);
-#endif
 extern struct page *kimage_alloc_control_pages(struct kimage *image,
 						unsigned int order);
 extern void crash_kexec(struct pt_regs *);

include/linux/syscalls.h

@@ -98,6 +98,8 @@ struct sigaltstack;
 #define __MAP(n,...) __MAP##n(__VA_ARGS__)
 
 #define __SC_DECL(t, a)	t a
+#define __TYPE_IS_L(t)	(__same_type((t)0, 0L))
+#define __TYPE_IS_UL(t)	(__same_type((t)0, 0UL))
 #define __TYPE_IS_LL(t) (__same_type((t)0, 0LL) || __same_type((t)0, 0ULL))
 #define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a
 #define __SC_CAST(t, a)	(t) a

include/uapi/asm-generic/unistd.h

@@ -191,6 +191,7 @@ __SYSCALL(__NR_quotactl, sys_quotactl)
 
 /* fs/readdir.c */
 #define __NR_getdents64 61
+#define __ARCH_WANT_COMPAT_SYS_GETDENTS64
 __SC_COMP(__NR_getdents64, sys_getdents64, compat_sys_getdents64)
 
 /* fs/read_write.c */

ipc/compat.c

@@ -430,9 +430,9 @@ COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
 }
 
 COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
-		       compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
+		       compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
 {
-	return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
+	return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
 			 msgflg, compat_do_msg_fill);
 }
 
@@ -498,7 +498,7 @@ static inline int put_compat_msqid_ds(struct msqid64_ds *m,
 	return err;
 }
 
-long compat_sys_msgctl(int first, int second, void __user *uptr)
+COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
 {
 	int err, err2;
 	struct msqid64_ds m64;
@@ -668,7 +668,7 @@ static inline int put_compat_shm_info(struct shm_info __user *ip,
 	return err;
 }
 
-long compat_sys_shmctl(int first, int second, void __user *uptr)
+COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr)
 {
 	void __user *p;
 	struct shmid64_ds s64;
@@ -749,8 +749,9 @@ long compat_sys_shmctl(int first, int second, void __user *uptr)
 	return err;
 }
 
-long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
-		unsigned nsops, const struct compat_timespec __user *timeout)
+COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
+		       unsigned, nsops,
+		       const struct compat_timespec __user *, timeout)
 {
 	struct timespec __user *ts64 = NULL;
 	if (timeout) {

ipc/compat_mq.c

@@ -46,9 +46,9 @@ static inline int put_compat_mq_attr(const struct mq_attr *attr,
 		| __put_user(attr->mq_curmsgs, &uattr->mq_curmsgs);
 }
 
-asmlinkage long compat_sys_mq_open(const char __user *u_name,
-			int oflag, compat_mode_t mode,
-			struct compat_mq_attr __user *u_attr)
+COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name,
+		       int, oflag, compat_mode_t, mode,
+		       struct compat_mq_attr __user *, u_attr)
 {
 	void __user *p = NULL;
 	if (u_attr && oflag & O_CREAT) {
@@ -78,10 +78,10 @@ static int compat_prepare_timeout(struct timespec __user **p,
 	return 0;
 }
 
-asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
-			const char __user *u_msg_ptr,
-			size_t msg_len, unsigned int msg_prio,
-			const struct compat_timespec __user *u_abs_timeout)
+COMPAT_SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes,
+		       const char __user *, u_msg_ptr,
+		       compat_size_t, msg_len, unsigned int, msg_prio,
+		       const struct compat_timespec __user *, u_abs_timeout)
 {
 	struct timespec __user *u_ts;
 
@@ -92,10 +92,10 @@ asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 			msg_prio, u_ts);
 }
 
-asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
-			char __user *u_msg_ptr,
-			size_t msg_len, unsigned int __user *u_msg_prio,
-			const struct compat_timespec __user *u_abs_timeout)
+COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes,
+		       char __user *, u_msg_ptr,
+		       compat_size_t, msg_len, unsigned int __user *, u_msg_prio,
+		       const struct compat_timespec __user *, u_abs_timeout)
 {
 	struct timespec __user *u_ts;
 	if (compat_prepare_timeout(&u_ts, u_abs_timeout))
@@ -105,8 +105,8 @@ asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 			u_msg_prio, u_ts);
 }
 
-asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
-			const struct compat_sigevent __user *u_notification)
+COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
+		       const struct compat_sigevent __user *, u_notification)
 {
 	struct sigevent __user *p = NULL;
 	if (u_notification) {
@@ -122,9 +122,9 @@ asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 	return sys_mq_notify(mqdes, p);
 }
 
-asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
-			const struct compat_mq_attr __user *u_mqstat,
-			struct compat_mq_attr __user *u_omqstat)
+COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
+		       const struct compat_mq_attr __user *, u_mqstat,
+		       struct compat_mq_attr __user *, u_omqstat)
 {
 	struct mq_attr mqstat;
 	struct mq_attr __user *p = compat_alloc_user_space(2 * sizeof(*p));

kernel/compat.c

@@ -110,8 +110,8 @@ static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc)
 	return 0;
 }
 
-asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
-		struct timezone __user *tz)
+COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
+		       struct timezone __user *, tz)
 {
 	if (tv) {
 		struct timeval ktv;
@@ -127,8 +127,8 @@ asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
 	return 0;
 }
 
-asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
-		struct timezone __user *tz)
+COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
+		       struct timezone __user *, tz)
 {
 	struct timespec kts;
 	struct timezone ktz;
@@ -236,8 +236,8 @@ static long compat_nanosleep_restart(struct restart_block *restart)
 	return ret;
 }
 
-asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
-				     struct compat_timespec __user *rmtp)
+COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp,
+		       struct compat_timespec __user *, rmtp)
 {
 	struct timespec tu, rmt;
 	mm_segment_t oldfs;
@@ -328,7 +328,7 @@ static compat_clock_t clock_t_to_compat_clock_t(clock_t x)
 	return compat_jiffies_to_clock_t(clock_t_to_jiffies(x));
 }
 
-asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
+COMPAT_SYSCALL_DEFINE1(times, struct compat_tms __user *, tbuf)
 {
 	if (tbuf) {
 		struct tms tms;
@@ -354,7 +354,7 @@ asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
  * types that can be passed to put_user()/get_user().
  */
 
-asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
+COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set)
 {
 	old_sigset_t s;
 	long ret;
@@ -424,8 +424,8 @@ COMPAT_SYSCALL_DEFINE3(sigprocmask, int, how,
 
 #endif
 
-asmlinkage long compat_sys_setrlimit(unsigned int resource,
-		struct compat_rlimit __user *rlim)
+COMPAT_SYSCALL_DEFINE2(setrlimit, unsigned int, resource,
+		       struct compat_rlimit __user *, rlim)
 {
 	struct rlimit r;
 
@@ -443,8 +443,8 @@ asmlinkage long compat_sys_setrlimit(unsigned int resource,
 
 #ifdef COMPAT_RLIM_OLD_INFINITY
 
-asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
-		struct compat_rlimit __user *rlim)
+COMPAT_SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource,
+		       struct compat_rlimit __user *, rlim)
 {
 	struct rlimit r;
 	int ret;
@@ -470,8 +470,8 @@ asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
 
 #endif
 
-asmlinkage long compat_sys_getrlimit(unsigned int resource,
-		struct compat_rlimit __user *rlim)
+COMPAT_SYSCALL_DEFINE2(getrlimit, unsigned int, resource,
+		       struct compat_rlimit __user *, rlim)
 {
 	struct rlimit r;
 	int ret;
@@ -596,9 +596,9 @@ static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
 	return compat_get_bitmap(k, user_mask_ptr, len * 8);
 }
 
-asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
-					     unsigned int len,
-					     compat_ulong_t __user *user_mask_ptr)
+COMPAT_SYSCALL_DEFINE3(sched_setaffinity, compat_pid_t, pid,
+		       unsigned int, len,
+		       compat_ulong_t __user *, user_mask_ptr)
 {
 	cpumask_var_t new_mask;
 	int retval;
@@ -616,8 +616,8 @@ asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 	return retval;
 }
 
-asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
-					     compat_ulong_t __user *user_mask_ptr)
+COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t,  pid, unsigned int, len,
+		       compat_ulong_t __user *, user_mask_ptr)
 {
 	int ret;
 	cpumask_var_t mask;
@@ -662,9 +662,9 @@ int put_compat_itimerspec(struct compat_itimerspec __user *dst,
 	return 0;
 }
 
-long compat_sys_timer_create(clockid_t which_clock,
-			struct compat_sigevent __user *timer_event_spec,
-			timer_t __user *created_timer_id)
+COMPAT_SYSCALL_DEFINE3(timer_create, clockid_t, which_clock,
+		       struct compat_sigevent __user *, timer_event_spec,
+		       timer_t __user *, created_timer_id)
 {
 	struct sigevent __user *event = NULL;
 
@@ -680,9 +680,9 @@ long compat_sys_timer_create(clockid_t which_clock,
 	return sys_timer_create(which_clock, event, created_timer_id);
 }
 
-long compat_sys_timer_settime(timer_t timer_id, int flags,
-			  struct compat_itimerspec __user *new,
-			  struct compat_itimerspec __user *old)
+COMPAT_SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
+		       struct compat_itimerspec __user *, new,
+		       struct compat_itimerspec __user *, old)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -703,8 +703,8 @@ long compat_sys_timer_settime(timer_t timer_id, int flags,
 	return err;
 }
 
-long compat_sys_timer_gettime(timer_t timer_id,
-		struct compat_itimerspec __user *setting)
+COMPAT_SYSCALL_DEFINE2(timer_gettime, timer_t, timer_id,
+		       struct compat_itimerspec __user *, setting)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -720,8 +720,8 @@ long compat_sys_timer_gettime(timer_t timer_id,
 	return err;
 }
 
-long compat_sys_clock_settime(clockid_t which_clock,
-		struct compat_timespec __user *tp)
+COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock,
+		       struct compat_timespec __user *, tp)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -737,8 +737,8 @@ long compat_sys_clock_settime(clockid_t which_clock,
 	return err;
 }
 
-long compat_sys_clock_gettime(clockid_t which_clock,
-		struct compat_timespec __user *tp)
+COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
+		       struct compat_timespec __user *, tp)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -754,8 +754,8 @@ long compat_sys_clock_gettime(clockid_t which_clock,
 	return err;
 }
 
-long compat_sys_clock_adjtime(clockid_t which_clock,
-		struct compat_timex __user *utp)
+COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock,
+		       struct compat_timex __user *, utp)
 {
 	struct timex txc;
 	mm_segment_t oldfs;
@@ -777,8 +777,8 @@ long compat_sys_clock_adjtime(clockid_t which_clock,
 	return ret;
 }
 
-long compat_sys_clock_getres(clockid_t which_clock,
-		struct compat_timespec __user *tp)
+COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
+		       struct compat_timespec __user *, tp)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -818,9 +818,9 @@ static long compat_clock_nanosleep_restart(struct restart_block *restart)
 	return err;
 }
 
-long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
-			    struct compat_timespec __user *rqtp,
-			    struct compat_timespec __user *rmtp)
+COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
+		       struct compat_timespec __user *, rqtp,
+		       struct compat_timespec __user *, rmtp)
 {
 	long err;
 	mm_segment_t oldfs;
@@ -1010,7 +1010,7 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
 
 /* compat_time_t is a 32 bit "long" and needs to get converted. */
 
-asmlinkage long compat_sys_time(compat_time_t __user * tloc)
+COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc)
 {
 	compat_time_t i;
 	struct timeval tv;
@@ -1026,7 +1026,7 @@ asmlinkage long compat_sys_time(compat_time_t __user * tloc)
 	return i;
 }
 
-asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
+COMPAT_SYSCALL_DEFINE1(stime, compat_time_t __user *, tptr)
 {
 	struct timespec tv;
 	int err;
@@ -1046,7 +1046,7 @@ asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
 
 #endif /* __ARCH_WANT_COMPAT_SYS_TIME */
 
-asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
+COMPAT_SYSCALL_DEFINE1(adjtimex, struct compat_timex __user *, utp)
 {
 	struct timex txc;
 	int err, ret;
@@ -1065,11 +1065,11 @@ asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
 }
 
 #ifdef CONFIG_NUMA
-asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
-		compat_uptr_t __user *pages32,
-		const int __user *nodes,
-		int __user *status,
-		int flags)
+COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages,
+		       compat_uptr_t __user *, pages32,
+		       const int __user *, nodes,
+		       int __user *, status,
+		       int, flags)
 {
 	const void __user * __user *pages;
 	int i;
@@ -1085,10 +1085,10 @@ asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
 	return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
 }
 
-asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
-			compat_ulong_t maxnode,
-			const compat_ulong_t __user *old_nodes,
-			const compat_ulong_t __user *new_nodes)
+COMPAT_SYSCALL_DEFINE4(migrate_pages, compat_pid_t, pid,
+		       compat_ulong_t, maxnode,
+		       const compat_ulong_t __user *, old_nodes,
+		       const compat_ulong_t __user *, new_nodes)
 {
 	unsigned long __user *old = NULL;
 	unsigned long __user *new = NULL;

kernel/kexec.c

@@ -1039,10 +1039,10 @@ void __weak crash_unmap_reserved_pages(void)
 {}
 
 #ifdef CONFIG_COMPAT
-asmlinkage long compat_sys_kexec_load(unsigned long entry,
-				unsigned long nr_segments,
-				struct compat_kexec_segment __user *segments,
-				unsigned long flags)
+COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
+		       compat_ulong_t, nr_segments,
+		       struct compat_kexec_segment __user *, segments,
+		       compat_ulong_t, flags)
 {
 	struct compat_kexec_segment in;
 	struct kexec_segment out, __user *ksegments;

kernel/ptrace.c

@@ -1180,8 +1180,8 @@ int compat_ptrace_request(struct task_struct *child, compat_long_t request,
 	return ret;
 }
 
-asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
-				  compat_long_t addr, compat_long_t data)
+COMPAT_SYSCALL_DEFINE4(ptrace, compat_long_t, request, compat_long_t, pid,
+		       compat_long_t, addr, compat_long_t, data)
 {
 	struct task_struct *child;
 	long ret;

mm/mempolicy.c

@@ -1556,10 +1556,10 @@ SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
 
 #ifdef CONFIG_COMPAT
 
-asmlinkage long compat_sys_get_mempolicy(int __user *policy,
-				     compat_ulong_t __user *nmask,
-				     compat_ulong_t maxnode,
-				     compat_ulong_t addr, compat_ulong_t flags)
+COMPAT_SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
+		       compat_ulong_t __user *, nmask,
+		       compat_ulong_t, maxnode,
+		       compat_ulong_t, addr, compat_ulong_t, flags)
 {
 	long err;
 	unsigned long __user *nm = NULL;
@@ -1586,8 +1586,8 @@ asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 	return err;
 }
 
-asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
-				     compat_ulong_t maxnode)
+COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask,
+		       compat_ulong_t, maxnode)
 {
 	long err = 0;
 	unsigned long __user *nm = NULL;
@@ -1609,9 +1609,9 @@ asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 	return sys_set_mempolicy(mode, nm, nr_bits+1);
 }
 
-asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
-			     compat_ulong_t mode, compat_ulong_t __user *nmask,
-			     compat_ulong_t maxnode, compat_ulong_t flags)
+COMPAT_SYSCALL_DEFINE6(mbind, compat_ulong_t, start, compat_ulong_t, len,
+		       compat_ulong_t, mode, compat_ulong_t __user *, nmask,
+		       compat_ulong_t, maxnode, compat_ulong_t, flags)
 {
 	long err = 0;
 	unsigned long __user *nm = NULL;

mm/process_vm_access.c

@@ -456,25 +456,23 @@ compat_process_vm_rw(compat_pid_t pid,
 	return rc;
 }
 
-asmlinkage ssize_t
-compat_sys_process_vm_readv(compat_pid_t pid,
-			    const struct compat_iovec __user *lvec,
-			    unsigned long liovcnt,
-			    const struct compat_iovec __user *rvec,
-			    unsigned long riovcnt,
-			    unsigned long flags)
+COMPAT_SYSCALL_DEFINE6(process_vm_readv, compat_pid_t, pid,
+		       const struct compat_iovec __user *, lvec,
+		       compat_ulong_t, liovcnt,
+		       const struct compat_iovec __user *, rvec,
+		       compat_ulong_t, riovcnt,
+		       compat_ulong_t, flags)
 {
 	return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
 				    riovcnt, flags, 0);
 }
 
-asmlinkage ssize_t
-compat_sys_process_vm_writev(compat_pid_t pid,
-			     const struct compat_iovec __user *lvec,
-			     unsigned long liovcnt,
-			     const struct compat_iovec __user *rvec,
-			     unsigned long riovcnt,
-			     unsigned long flags)
+COMPAT_SYSCALL_DEFINE6(process_vm_writev, compat_pid_t, pid,
+		       const struct compat_iovec __user *, lvec,
+		       compat_ulong_t, liovcnt,
+		       const struct compat_iovec __user *, rvec,
+		       compat_ulong_t, riovcnt,
+		       compat_ulong_t, flags)
 {
 	return compat_process_vm_rw(pid, lvec, liovcnt, rvec,
 				    riovcnt, flags, 1);

net/compat.c

@@ -384,8 +384,8 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
 	return sock_setsockopt(sock, level, optname, optval, optlen);
 }
 
-asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
-				char __user *optval, unsigned int optlen)
+COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
+		       char __user *, optval, unsigned int, optlen)
 {
 	int err;
 	struct socket *sock = sockfd_lookup(fd, &err);
@@ -504,8 +504,8 @@ int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *usersta
 }
 EXPORT_SYMBOL(compat_sock_get_timestampns);
 
-asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
-				char __user *optval, int __user *optlen)
+COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
+		       char __user *, optval, int __user *, optlen)
 {
 	int err;
 	struct socket *sock = sockfd_lookup(fd, &err);
@@ -735,15 +735,15 @@ static unsigned char nas[21] = {
 };
 #undef AL
 
-asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
+COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
 {
 	if (flags & MSG_CMSG_COMPAT)
 		return -EINVAL;
 	return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
-asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
-				    unsigned int vlen, unsigned int flags)
+COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
+		       unsigned int, vlen, unsigned int, flags)
 {
 	if (flags & MSG_CMSG_COMPAT)
 		return -EINVAL;
@@ -751,28 +751,28 @@ asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 			      flags | MSG_CMSG_COMPAT);
 }
 
-asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
+COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
 {
 	if (flags & MSG_CMSG_COMPAT)
 		return -EINVAL;
 	return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
-asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags)
+COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
 {
 	return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
 }
 
-asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
-				    unsigned int flags, struct sockaddr __user *addr,
-				    int __user *addrlen)
+COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
+		       unsigned int, flags, struct sockaddr __user *, addr,
+		       int __user *, addrlen)
 {
 	return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
 }
 
-asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
-				    unsigned int vlen, unsigned int flags,
-				    struct compat_timespec __user *timeout)
+COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
+		       unsigned int, vlen, unsigned int, flags,
+		       struct compat_timespec __user *, timeout)
 {
 	int datagrams;
 	struct timespec ktspec;
@@ -795,7 +795,7 @@ asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 	return datagrams;
 }
 
-asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
+COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
 {
 	int ret;
 	u32 a[6];

security/keys/compat.c

@@ -65,8 +65,8 @@ static long compat_keyctl_instantiate_key_iov(
  * taking a 32-bit syscall are zero.  If you can, you should call sys_keyctl()
  * directly.
  */
-asmlinkage long compat_sys_keyctl(u32 option,
-				  u32 arg2, u32 arg3, u32 arg4, u32 arg5)
+COMPAT_SYSCALL_DEFINE5(keyctl, u32, option,
+		       u32, arg2, u32, arg3, u32, arg4, u32, arg5)
 {
 	switch (option) {
 	case KEYCTL_GET_KEYRING_ID: