[PATCH] net/core: use xx_zalloc instead xx_alloc and memset

[Tian Tao]

use kmem_cache_zalloc instead kmem_cache_alloc and memset.

Signed-off-by: Tian Tao <tiantao6@xxxxxxxxxxxxx>
---
 net/core/skbuff.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index c9a5a3c..3449c1c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -313,12 +313,10 @@ struct sk_buff *__build_skb(void *data, unsigned int frag_size)
 {
 	struct sk_buff *skb;
 
-	skb = kmem_cache_alloc(skbuff_head_cache, GFP_ATOMIC);
+	skb = kmem_cache_zalloc(skbuff_head_cache, GFP_ATOMIC);
 	if (unlikely(!skb))
 		return NULL;
 
-	memset(skb, 0, offsetof(struct sk_buff, tail));
-
 	return __build_skb_around(skb, data, frag_size);
 }
 
@@ -6170,12 +6168,10 @@ static void *skb_ext_get_ptr(struct skb_ext *ext, enum skb_ext_id id)
  */
 struct skb_ext *__skb_ext_alloc(gfp_t flags)
 {
-	struct skb_ext *new = kmem_cache_alloc(skbuff_ext_cache, flags);
+	struct skb_ext *new = kmem_cache_zalloc(skbuff_ext_cache, flags);
 
-	if (new) {
-		memset(new->offset, 0, sizeof(new->offset));
+	if (new)
 		refcount_set(&new->refcnt, 1);
-	}
 
 	return new;
 }
-- 
2.7.4