remove checks for "impossible" errors,

clarify uses of unoptimized sigXXX ops (they check signo),
use faster sigops where approproate.

    text           data     bss     dec     hex filename
-     68              0       0      68      44 libc/signal/sighold.o
+     63              0       0      63      3f libc/signal/sighold.o
-    114              0       0     114      72 libc/signal/sigintr.o
+    110              0       0     110      6e libc/signal/sigintr.o
-    113              0       0     113      71 libc/signal/sigpause.o
+    108              0       0     108      6c libc/signal/sigpause.o
-     68              0       0      68      44 libc/signal/sigrelse.o
+     63              0       0      63      3f libc/signal/sigrelse.o

1 files changed, 1 insertions, 2 deletions

diff --git a/libc/sysdeps/linux/common/ssp.c b/libc/sysdeps/linux/common/ssp.c
index fadf6077b..564e14d71 100644
--- a/libc/sysdeps/linux/common/ssp.c
+++ b/libc/sysdeps/linux/common/ssp.c
@@ -52,8 +52,7 @@ static void block_signals(void)
 	sigset_t mask;
 
 	__sigfillset(&mask);
-
-	sigdelset(&mask, SSP_SIGTYPE);	/* Block all signal handlers */
+	__sigdelset(&mask, SSP_SIGTYPE);	/* Block all signal handlers */
 	sigprocmask(SIG_BLOCK, &mask, NULL);	/* except SSP_SIGTYPE */
 
 	/* Make the default handler associated with the signal handler */