linux-kernel - [PATCH v2 45/52] m68k: sun3: Annotate prom_printf() with _

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Message-Id: <61017c012617e6f633ac9f9a3c2659ae38e1f2fb.1694613528.git.geert@linux-m68k.org>
Date:   Wed, 13 Sep 2023 16:08:35 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     linux-m68k@...ts.linux-m68k.org
Cc:     Arnd Bergmann <arnd@...db.de>, Finn Thain <fthain@...ux-m68k.org>,
        Michael Schmitz <schmitzmic@...il.com>,
        Philip Blundell <philb@....org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Joshua Thompson <funaho@...ai.org>,
        Sam Creasey <sammy@...my.net>,
        Laurent Vivier <laurent@...ier.eu>,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH v2 45/52] m68k: sun3: Annotate prom_printf() with __printf()

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@...ux-m68k.org>
Acked-by: Arnd Bergmann <arnd@...db.de>
---
v2:
  - Add Acked-by.
---
 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