powerpc: switch to generic old sigsuspend

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

arch/powerpc/Kconfig

@@ -148,6 +148,7 @@ config PPC
 	select GENERIC_COMPAT_RT_SIGQUEUEINFO
 	select GENERIC_COMPAT_RT_SIGPROCMASK
 	select GENERIC_COMPAT_RT_SIGPENDING
+	select OLD_SIGSUSPEND
 
 config EARLY_PRINTK
 	bool

arch/powerpc/include/asm/systbl.h

@@ -75,6 +75,7 @@ SYSCALL_SPU(sgetmask)
 COMPAT_SYS_SPU(ssetmask)
 SYSCALL_SPU(setreuid)
 SYSCALL_SPU(setregid)
+#define compat_sys_sigsuspend sys_sigsuspend
 SYS32ONLY(sigsuspend)
 COMPAT_SYS(sigpending)
 COMPAT_SYS_SPU(sethostname)

arch/powerpc/kernel/signal_32.c

@@ -56,7 +56,6 @@
 #undef DEBUG_SIG
 
 #ifdef CONFIG_PPC64
-#define sys_sigsuspend	compat_sys_sigsuspend
 #define sys_rt_sigreturn	compat_sys_rt_sigreturn
 #define sys_sigaction	compat_sys_sigaction
 #define sys_swapcontext	compat_sys_swapcontext
@@ -238,16 +237,6 @@ static inline int restore_general_regs(struct pt_regs *regs,
 
 #endif /* CONFIG_PPC64 */
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-long sys_sigsuspend(old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
 long sys_sigaction(int sig, struct old_sigaction __user *act,
 		struct old_sigaction __user *oact)
 {