When building with W=1:
arch/m68k/sun3/prom/printf.c: In function ‘prom_printf’:
arch/m68k/sun3/prom/printf.c:35:9: warning: function ‘prom_printf’ might be a candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]
35 | vsprintf(ppbuf, fmt, args);
| ^~~~~~~~
Fix this by annotating prom_printf() with __printf(1, 2).
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
arch/m68k/include/asm/oplib.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/m68k/include/asm/oplib.h b/arch/m68k/include/asm/oplib.h
index 48cb4fd09f8d9cce..6d5ea67c65d044c1 100644
--- a/arch/m68k/include/asm/oplib.h
+++ b/arch/m68k/include/asm/oplib.h
@@ -9,6 +9,8 @@
#ifndef __SPARC_OPLIB_H
#define __SPARC_OPLIB_H
+#include <linux/compiler.h>
+
#include <asm/openprom.h>
/* The master romvec pointer... */
@@ -149,7 +151,7 @@ extern char prom_getchar(void);
extern void prom_putchar(char character);
/* Prom's internal printf routine, don't use in kernel/boot code. */
-void prom_printf(char *fmt, ...);
+__printf(1, 2) void prom_printf(char *fmt, ...);
/* Query for input device type */
--
2.34.1
