[POWERPC] Add gcc format warnings to zImage printf()

This patch adds the correct attributes to the zImage's versions of
printf to make gcc generate format string mismatch warnings.  It also
corrects several minor problems with format strings in the zImage thus
discovered.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/powerpc/boot/stdio.h b/arch/powerpc/boot/stdio.h
index 73b8a91bfb3..adffc58412d 100644
--- a/arch/powerpc/boot/stdio.h
+++ b/arch/powerpc/boot/stdio.h
@@ -7,11 +7,12 @@
 #define EINVAL          22      /* Invalid argument */
 #define ENOSPC          28      /* No space left on device */
 
-extern int printf(const char *fmt, ...);
+extern int printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
 
 #define fprintf(fmt, args...)   printf(args)
 
-extern int sprintf(char *buf, const char *fmt, ...);
+extern int sprintf(char *buf, const char *fmt, ...)
+        __attribute__((format(printf, 2, 3)));
 
 extern int vsprintf(char *buf, const char *fmt, va_list args);