[PATCH] driver core: add __printf verification to device_create_groups_vargs

[Mathieu Malaterre]

__printf is useful to verify format and arguments. Remove the following
warning (with W=1):

  drivers/base/core.c:2435:2: warning: function might be possible candidate for âgnu_printfâ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Mathieu Malaterre <malat@xxxxxxxxxx>
---
 drivers/base/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index b610816eb887..357e774ba13b 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2406,7 +2406,7 @@ static void device_create_release(struct device *dev)
 	kfree(dev);
 }
 
-static struct device *
+static __printf(6, 0) struct device *
 device_create_groups_vargs(struct class *class, struct device *parent,
 			   dev_t devt, void *drvdata,
 			   const struct attribute_group **groups,
-- 
2.11.0