[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 <tiant...@hisilicon.com>
---
 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