s390: switch to generic compat rt_sigprocmask(2)

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

arch/s390/Kconfig

@@ -141,6 +141,7 @@ config S390
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS2
 	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGPROCMASK
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y

arch/s390/kernel/compat_linux.c

@@ -368,35 +368,6 @@ asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
 	return ret;
 }
 
-asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
-			compat_sigset_t __user *oset, size_t sigsetsize)
-{
-	sigset_t s;
-	compat_sigset_t s32;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-	
-	if (set) {
-		if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
-			return -EFAULT;
-		s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
-	}
-	set_fs (KERNEL_DS);
-	ret = sys_rt_sigprocmask(how,
-				 set ? (sigset_t __force __user *) &s : NULL,
-				 oset ? (sigset_t __force __user *) &s : NULL,
-				 sigsetsize);
-	set_fs (old_fs);
-	if (ret) return ret;
-	if (oset) {
-		s32.sig[1] = (s.sig[0] >> 32);
-		s32.sig[0] = s.sig[0];
-		if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
-			return -EFAULT;
-	}
-	return 0;
-}
-
 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
 				size_t sigsetsize)
 {

arch/s390/kernel/compat_linux.h

@@ -115,8 +115,6 @@ long sys32_truncate64(const char __user * path, unsigned long high,
 long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low);
 long sys32_sched_rr_get_interval(compat_pid_t pid,
 				 struct compat_timespec __user *interval);
-long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
-			  compat_sigset_t __user *oset, size_t sigsetsize);
 long sys32_rt_sigpending(compat_sigset_t __user *set, size_t sigsetsize);
 long sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo);
 long sys32_init_module(void __user *umod, unsigned long len,

arch/s390/kernel/compat_wrapper.S

@@ -698,7 +698,7 @@ ENTRY(sys32_rt_sigprocmask_wrapper)
 	llgtr	%r3,%r3			# old_sigset_emu31 *
 	llgtr	%r4,%r4			# old_sigset_emu31 *
 	llgfr	%r5,%r5			# size_t
-	jg	sys32_rt_sigprocmask	# branch to system call
+	jg	compat_sys_rt_sigprocmask	# branch to system call
 
 ENTRY(sys32_rt_sigpending_wrapper)
 	llgtr	%r2,%r2			# sigset_emu31 *