add new membarrier, userfaultfd and switch_endian syscalls

new in linux v4.3 added for aarch64, arm, i386, mips, or1k, powerpc,
x32 and x86_64.

membarrier is a system wide memory barrier, moves most of the
synchronization cost to one side, new in kernel commit
5b25b13ab08f616efd566347d809b4ece54570d1

userfaultfd is useful for qemu and is new in kernel commit
8d2afd96c20316d112e04d935d9e09150e988397

switch_endian is powerpc only for switching endianness, new in commit
529d235a0e190ded1d21ccc80a73e625ebcad09b

arch/aarch64/bits/syscall.h

@@ -265,6 +265,8 @@
 #define __NR_memfd_create 279
 #define __NR_bpf 280
 #define __NR_execveat 281
+#define __NR_userfaultfd 282
+#define __NR_membarrier 283
 
 #define SYS_io_setup __NR_io_setup
 #define SYS_io_destroy __NR_io_destroy
@@ -533,3 +535,5 @@
 #define SYS_memfd_create __NR_memfd_create
 #define SYS_bpf __NR_bpf
 #define SYS_execveat __NR_execveat
+#define SYS_userfaultfd __NR_userfaultfd
+#define SYS_membarrier __NR_membarrier

arch/arm/bits/syscall.h

@@ -341,6 +341,8 @@
 #define __NR_memfd_create	385
 #define __NR_bpf	386
 #define __NR_execveat	387
+#define __NR_userfaultfd	388
+#define __NR_membarrier		389
 
 #define __ARM_NR_breakpoint	0x0f0001
 #define __ARM_NR_cacheflush	0x0f0002
@@ -693,3 +695,5 @@
 #define SYS_memfd_create	385
 #define SYS_bpf	386
 #define SYS_execveat	387
+#define SYS_userfaultfd	388
+#define SYS_membarrier		389

arch/i386/bits/syscall.h

@@ -372,6 +372,8 @@
 #define __NR_recvfrom		371
 #define __NR_recvmsg		372
 #define __NR_shutdown		373
+#define __NR_userfaultfd	374
+#define __NR_membarrier		375
 
 
 /* Repeated with SYS_ prefix */
@@ -750,3 +752,5 @@
 #define SYS_recvfrom		371
 #define SYS_recvmsg		372
 #define SYS_shutdown		373
+#define SYS_userfaultfd		374
+#define SYS_membarrier		375

arch/mips/bits/syscall.h

@@ -354,6 +354,8 @@
 #define __NR_memfd_create            4354
 #define __NR_bpf                     4355
 #define __NR_execveat                4356
+#define __NR_userfaultfd             4357
+#define __NR_membarrier              4358
 
 
 /* Repeated with SYS_ prefix */
@@ -713,3 +715,5 @@
 #define SYS_memfd_create            4354
 #define SYS_bpf                     4355
 #define SYS_execveat                4356
+#define SYS_userfaultfd             4357
+#define SYS_membarrier              4358

arch/or1k/bits/syscall.h

@@ -265,6 +265,8 @@
 #define __NR_memfd_create 279
 #define __NR_bpf 280
 #define __NR_execveat 281
+#define __NR_userfaultfd 282
+#define __NR_membarrier 283
 
 #define SYS_io_setup __NR_io_setup
 #define SYS_io_destroy __NR_io_destroy
@@ -533,3 +535,5 @@
 #define SYS_memfd_create __NR_memfd_create
 #define SYS_bpf __NR_bpf
 #define SYS_execveat __NR_execveat
+#define SYS_userfaultfd __NR_userfaultfd
+#define SYS_membarrier __NR_membarrier

arch/powerpc/bits/syscall.h

@@ -364,6 +364,9 @@
 #define __NR_memfd_create          360
 #define __NR_bpf                   361
 #define __NR_execveat              362
+#define __NR_switch_endian         363
+#define __NR_userfaultfd           364
+#define __NR_membarrier            365
 
 /*
  * repeated with SYS prefix
@@ -734,3 +737,6 @@
 #define SYS_memfd_create          360
 #define SYS_bpf                   361
 #define SYS_execveat              362
+#define SYS_switch_endian         363
+#define SYS_userfaultfd           364
+#define SYS_membarrier            365

arch/x32/bits/syscall.h

@@ -277,6 +277,8 @@
 #define __NR_memfd_create (__X32_SYSCALL_BIT + 319)
 #define __NR_kexec_file_load (__X32_SYSCALL_BIT + 320)
 #define __NR_bpf (__X32_SYSCALL_BIT + 321)
+#define __NR_userfaultfd (__X32_SYSCALL_BIT + 323)
+#define __NR_membarrier (__X32_SYSCALL_BIT + 324)
 
 #define __NR_rt_sigaction (__X32_SYSCALL_BIT + 512)
 #define __NR_rt_sigreturn (__X32_SYSCALL_BIT + 513)
@@ -607,6 +609,8 @@
 #define SYS_memfd_create __NR_memfd_create
 #define SYS_kexec_file_load __NR_kexec_file_load
 #define SYS_bpf __NR_bpf
+#define SYS_userfaultfd __NR_userfaultfd
+#define SYS_membarrier __NR_membarrier
 
 
 #define SYS_rt_sigaction __NR_rt_sigaction

arch/x86_64/bits/syscall.h

@@ -321,6 +321,8 @@
 #define __NR_kexec_file_load			320
 #define __NR_bpf				321
 #define __NR_execveat				322
+#define __NR_userfaultfd			323
+#define __NR_membarrier				324
 
 
 
@@ -649,3 +651,5 @@
 #define SYS_kexec_file_load			320
 #define SYS_bpf					321
 #define SYS_execveat				322
+#define SYS_userfaultfd				323
+#define SYS_membarrier				324