arm: switch to generic old sigsuspend

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

arch/arm/Kconfig

@@ -57,6 +57,7 @@ config ARM
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
 	select GENERIC_SIGALTSTACK
+	select OLD_SIGSUSPEND3
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and

arch/arm/kernel/signal.c

@@ -45,16 +45,6 @@ const unsigned long sigreturn_codes[7] = {
 	MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
 };
 
-/*
- * atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
 asmlinkage int 
 sys_sigaction(int sig, const struct old_sigaction __user *act,
 	      struct old_sigaction __user *oact)