linux-kernel - [PATCH 1/1] usb: dwc2: add printf attribute to cat

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Date:	Sun, 26 Jun 2016 10:12:38 +0200
From:	Nicolas Iooss <nicolas.iooss_linux@....org>
To:	John Youn <johnyoun@...opsys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Nicolas Iooss <nicolas.iooss_linux@....org>
Subject: [PATCH 1/1] usb: dwc2: add printf attribute to cat_printf()

As cat_printf() uses printf format strings in its parameters, adding
__printf attribute allows the compiler to detect at compile-time some
errors related to format strings (with -Wformat warning flag).

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@....org>
---
 drivers/usb/dwc2/hcd_queue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c
index b5c7793a2df2..13754353251f 100644
--- a/drivers/usb/dwc2/hcd_queue.c
+++ b/drivers/usb/dwc2/hcd_queue.c
@@ -367,7 +367,8 @@ static void pmap_unschedule(unsigned long *map, int bits_per_period,
  * @fmt:   The format for printf.
  * @...:   The args for printf.
  */
-static void cat_printf(char **buf, size_t *size, const char *fmt, ...)
+static __printf(3, 4)
+void cat_printf(char **buf, size_t *size, const char *fmt, ...)
 {
 	va_list args;
 	int i;
-- 
2.9.0