alpha: switch to generic old sigsuspend

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

arch/alpha/Kconfig

@@ -24,6 +24,7 @@ config ALPHA
 	select MODULES_USE_ELF_RELA
 	select GENERIC_SIGALTSTACK
 	select ODD_RT_SIGACTION
+	select OLD_SIGSUSPEND
 	help
 	  The Alpha is a 64-bit general-purpose processor designed and
 	  marketed by the Digital Equipment Corporation of blessed memory,

arch/alpha/kernel/signal.c

@@ -112,16 +112,6 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
 	return ret;
 }
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
-{
-	sigset_t blocked;
-	siginitset(&blocked, mask);
-	return sigsuspend(&blocked);
-}
-
 /*
  * Do a signal return; undo the signal stack.
  */