kunit: skb: use "gfp" variable instead of hardcoding GFP_KERNEL

The intent here was clearly to use the gfp variable flags instead of
hardcoding GFP_KERNEL.  All the callers pass GFP_KERNEL as the gfp
flags so this doesn't affect runtime.

Fixes: b3231d3 ("kunit: add a convenience allocation wrapper for SKBs")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: David Gow <[email protected]>
Reviewed-by: Kuan-Wei Chiu <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

Author: Dan Carpenter

include/kunit/skbuff.h

@@ -29,7 +29,7 @@ static void kunit_action_kfree_skb(void *p)
 static inline struct sk_buff *kunit_zalloc_skb(struct kunit *test, int len,
 					       gfp_t gfp)
 {
-	struct sk_buff *res = alloc_skb(len, GFP_KERNEL);
+	struct sk_buff *res = alloc_skb(len, gfp);
 
 	if (!res || skb_pad(res, len))
 		return NULL;