linux-kernel - [PATCH] platform/chrome: cros_usbpd_logger: Add __printf annotation to append

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Message-Id: <20200414201239.1506922-1-enric.balletbo@collabora.com>
Date:   Tue, 14 Apr 2020 22:12:39 +0200
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     linux-kernel@...r.kernel.org
Cc:     Collabora Kernel ML <kernel@...labora.com>, groeck@...omium.org,
        bleung@...omium.org, dtor@...omium.org, gwendal@...omium.org
Subject: [PATCH] platform/chrome: cros_usbpd_logger: Add __printf annotation to append_str()

This allows the compiler to verify the format strings vs the types of
the arguments. Also, silence the warning (triggered by W=1):

  cros_usbpd_logger.c:55:2: warning: function ‘append_str’ might be a
  candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---

 drivers/platform/chrome/cros_usbpd_logger.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/chrome/cros_usbpd_logger.c b/drivers/platform/chrome/cros_usbpd_logger.c
index 7de3ea75ef46..d16931203d82 100644
--- a/drivers/platform/chrome/cros_usbpd_logger.c
+++ b/drivers/platform/chrome/cros_usbpd_logger.c
@@ -46,6 +46,7 @@ static const char * const fault_names[] = {
 	"---", "OCP", "fast OCP", "OVP", "Discharge"
 };
 
+__printf(3, 4)
 static int append_str(char *buf, int pos, const char *fmt, ...)
 {
 	va_list args;
-- 
2.25.1