diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/7019-net-readd-skb_recycle.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/7019-net-readd-skb_recycle.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/7019-net-readd-skb_recycle.patch b/target/linux/layerscape/patches-4.4/7019-net-readd-skb_recycle.patch new file mode 100644 index 0000000000..062233f18b --- /dev/null +++ b/target/linux/layerscape/patches-4.4/7019-net-readd-skb_recycle.patch @@ -0,0 +1,59 @@ +From abc24ef7a69f54c3317beea98078831ba9bfa2cd Mon Sep 17 00:00:00 2001 +From: Madalin Bucur <madalin.bucur@freescale.com> +Date: Tue, 5 Jan 2016 12:12:07 +0200 +Subject: [PATCH 19/70] net: readd skb_recycle() + +Adding back skb_recycle() as it's used by the DPAA Ethernet driver. +This was removed from the upstream kernel because it was lacking users. + +Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com> +--- + include/linux/skbuff.h | 1 + + net/core/skbuff.c | 26 ++++++++++++++++++++++++++ + 2 files changed, 27 insertions(+) + +--- a/include/linux/skbuff.h ++++ b/include/linux/skbuff.h +@@ -799,6 +799,7 @@ void kfree_skb(struct sk_buff *skb); + void kfree_skb_list(struct sk_buff *segs); + void skb_tx_error(struct sk_buff *skb); + void consume_skb(struct sk_buff *skb); ++void skb_recycle(struct sk_buff *skb); + void __kfree_skb(struct sk_buff *skb); + extern struct kmem_cache *skbuff_head_cache; + +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c +@@ -766,6 +766,32 @@ void consume_skb(struct sk_buff *skb) + } + EXPORT_SYMBOL(consume_skb); + ++/** ++ * skb_recycle - clean up an skb for reuse ++ * @skb: buffer ++ * ++ * Recycles the skb to be reused as a receive buffer. This ++ * function does any necessary reference count dropping, and ++ * cleans up the skbuff as if it just came from __alloc_skb(). ++ */ ++void skb_recycle(struct sk_buff *skb) ++{ ++ struct skb_shared_info *shinfo; ++ u8 head_frag = skb->head_frag; ++ ++ skb_release_head_state(skb); ++ ++ shinfo = skb_shinfo(skb); ++ memset(shinfo, 0, offsetof(struct skb_shared_info, dataref)); ++ atomic_set(&shinfo->dataref, 1); ++ ++ memset(skb, 0, offsetof(struct sk_buff, tail)); ++ skb->data = skb->head + NET_SKB_PAD; ++ skb->head_frag = head_frag; ++ skb_reset_tail_pointer(skb); ++} ++EXPORT_SYMBOL(skb_recycle); ++ + /* Make sure a field is enclosed inside headers_start/headers_end section */ + #define CHECK_SKB_FIELD(field) \ + BUILD_BUG_ON(offsetof(struct sk_buff, field) < \ |