driver core: add __printf verification to device_create_groups_vargs

__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 ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index c4fc083870c2..35221144e0e6 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2411,7 +2411,7 @@ 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,