s390: switch to generic old sigsuspend

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

arch/s390/Kconfig

@@ -144,6 +144,7 @@ config S390
 	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_COMPAT_RT_SIGPROCMASK
 	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND3
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y

arch/s390/kernel/entry.h

@@ -73,7 +73,6 @@ long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
 long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
 long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
 			u32 len_low);
-long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
 long sys_sigaction(int sig, const struct old_sigaction __user *act,
 		   struct old_sigaction __user *oact);
 long sys_sigreturn(void);

arch/s390/kernel/signal.c

@@ -48,16 +48,6 @@ typedef struct
 	struct ucontext uc;
 } rt_sigframe;
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
 SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
 		struct old_sigaction __user *, oact)
 {