[PATCH printk v1] printk: use gnu_printf format attribute for printk_sprint()

[John Ogness]

Fix the following W=1 kernel build warning:

kernel/printk/printk.c: In function 'printk_sprint':
kernel/printk/printk.c:1913:9: warning: function 'printk_sprint' might be
a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: John Ogness <john.ogness@xxxxxxxxxxxxx>
---
 kernel/printk/printk.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 4d6dea5d7c1c..d617987f5785 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2066,6 +2066,7 @@ u16 printk_parse_prefix(const char *text, int *level,
 	return prefix_len;
 }
 
+__printf(5, 0)
 static u16 printk_sprint(char *text, u16 size, int facility,
 			 enum printk_info_flags *flags, const char *fmt,
 			 va_list args)

base-commit: 9980c4251f8ddfcf0617ed5724e4df5bd1f69c85
-- 
2.30.2