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-rw-r--r--include/asm-powerpc/udbg.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h
index 5c4236c342bb..19a1517ac43b 100644
--- a/include/asm-powerpc/udbg.h
+++ b/include/asm-powerpc/udbg.h
@@ -23,7 +23,8 @@ extern int udbg_write(const char *s, int n);
extern int udbg_read(char *buf, int buflen);
extern void register_early_udbg_console(void);
-extern void udbg_printf(const char *fmt, ...);
+extern void udbg_printf(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
extern void udbg_progress(char *s, unsigned short hex);
extern void udbg_init_uart(void __iomem *comport, unsigned int speed,