panic: add noreturn attribute

Since panic() never returns, we should add an appropriate attribute to
let gcc improve optimization around it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/include/common.h b/include/common.h
index 3113580bf88e0d26ec334dfd839600305ee21004..6061643873c0cf7aff529596d75d0b8196d8853f 100644 (file)
--- a/include/common.h
+++ b/include/common.h
@@ -653,7 +653,7 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
 unsigned long long     simple_strtoull(const char *cp,char **endp,unsigned int base);
 long   simple_strtol(const char *cp,char **endp,unsigned int base);
 void   panic(const char *fmt, ...)
-               __attribute__ ((format (__printf__, 1, 2)));
+               __attribute__ ((format (__printf__, 1, 2), noreturn));
 int    sprintf(char * buf, const char *fmt, ...)
                __attribute__ ((format (__printf__, 2, 3)));
 int    vsprintf(char *buf, const char *fmt, va_list args);