From 06dc75ab06943fcc126a951a0680980ad5cb75c6 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 17 Jul 2017 18:56:54 +0200 Subject: net: Revert "net: add function to allocate sk_buff head without data area" It was added for netlink mmap tx, there are no callers in the tree. The commit also added a check for skb->head != NULL in kfree_skb path, remove that too -- all skbs ought to have skb->head set. Signed-off-by: Florian Westphal Signed-off-by: David S. Miller --- net/core/skbuff.c | 31 ++----------------------------- 1 file changed, 2 insertions(+), 29 deletions(-) (limited to 'net/core/skbuff.c') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index b352c6bcfb31..6bc19c80c210 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -158,31 +158,6 @@ out: * */ -struct sk_buff *__alloc_skb_head(gfp_t gfp_mask, int node) -{ - struct sk_buff *skb; - - /* Get the HEAD */ - skb = kmem_cache_alloc_node(skbuff_head_cache, - gfp_mask & ~__GFP_DMA, node); - if (!skb) - goto out; - - /* - * Only clear those fields we need to clear, not those that we will - * actually initialise below. Hence, don't put any more fields after - * the tail pointer in struct sk_buff! - */ - memset(skb, 0, offsetof(struct sk_buff, tail)); - skb->head = NULL; - skb->truesize = sizeof(struct sk_buff); - refcount_set(&skb->users, 1); - - skb->mac_header = (typeof(skb->mac_header))~0U; -out: - return skb; -} - /** * __alloc_skb - allocate a network buffer * @size: size to allocate @@ -663,8 +638,7 @@ void skb_release_head_state(struct sk_buff *skb) static void skb_release_all(struct sk_buff *skb) { skb_release_head_state(skb); - if (likely(skb->head)) - skb_release_data(skb); + skb_release_data(skb); } /** @@ -762,8 +736,7 @@ void consume_stateless_skb(struct sk_buff *skb) return; trace_consume_skb(skb); - if (likely(skb->head)) - skb_release_data(skb); + skb_release_data(skb); kfree_skbmem(skb); } -- cgit v1.2.3-59-g8ed1b