mips: switch to generic compat rt_sigprocmask()

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

arch/mips/Kconfig

@@ -42,6 +42,7 @@ config MIPS
 	select MODULES_USE_ELF_REL if MODULES
 	select MODULES_USE_ELF_RELA if MODULES && 64BIT
 	select GENERIC_SIGALTSTACK
+	select GENERIC_COMPAT_RT_SIGPROCMASK
 
 menu "Machine selection"
 

arch/mips/kernel/scall64-n32.S

@@ -118,7 +118,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_munmap
 	PTR	sys_brk
 	PTR	sys_32_rt_sigaction
-	PTR	sys_32_rt_sigprocmask
+	PTR	compat_sys_rt_sigprocmask
 	PTR	compat_sys_ioctl		/* 6015 */
 	PTR	sys_pread64
 	PTR	sys_pwrite64

arch/mips/kernel/scall64-o32.S

@@ -387,7 +387,7 @@ sys_call_table:
 	PTR	sys_prctl
 	PTR	sys32_rt_sigreturn
 	PTR	sys_32_rt_sigaction
-	PTR	sys_32_rt_sigprocmask 		/* 4195 */
+	PTR	compat_sys_rt_sigprocmask 	/* 4195 */
 	PTR	sys_32_rt_sigpending
 	PTR	compat_sys_rt_sigtimedwait
 	PTR	sys_32_rt_sigqueueinfo

arch/mips/kernel/signal32.c

@@ -614,28 +614,6 @@ out:
 	return ret;
 }
 
-SYSCALL_DEFINE4(32_rt_sigprocmask, int, how, compat_sigset_t __user *, set,
-	compat_sigset_t __user *, oset, unsigned int, sigsetsize)
-{
-	sigset_t old_set, new_set;
-	int ret;
-	mm_segment_t old_fs = get_fs();
-
-	if (set && get_sigset(&new_set, set))
-		return -EFAULT;
-
-	set_fs(KERNEL_DS);
-	ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
-				 oset ? (sigset_t __user *)&old_set : NULL,
-				 sigsetsize);
-	set_fs(old_fs);
-
-	if (!ret && oset && put_sigset(&old_set, oset))
-		return -EFAULT;
-
-	return ret;
-}
-
 SYSCALL_DEFINE2(32_rt_sigpending, compat_sigset_t __user *, uset,
 	unsigned int, sigsetsize)
 {