diff options
Diffstat (limited to 'target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch')
| -rw-r--r-- | target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch b/target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch new file mode 100644 index 000000000..5b2537127 --- /dev/null +++ b/target/linux/generic/patches-3.3/654-avoid_skb_cow_realloc.patch @@ -0,0 +1,21 @@ +--- a/include/linux/skbuff.h ++++ b/include/linux/skbuff.h +@@ -1850,12 +1850,15 @@ static inline int skb_clone_writable(con + static inline int __skb_cow(struct sk_buff *skb, unsigned int headroom, + int cloned) + { ++ unsigned int alloc_headroom = headroom; + int delta = 0; + + if (headroom < NET_SKB_PAD) +- headroom = NET_SKB_PAD; +- if (headroom > skb_headroom(skb)) +- delta = headroom - skb_headroom(skb); ++ alloc_headroom = NET_SKB_PAD; ++ if (headroom > skb_headroom(skb) || ++ (cloned && alloc_headroom > skb_headroom(skb))) { ++ delta = alloc_headroom - skb_headroom(skb); ++ } + + if (delta || cloned) + return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD), 0, |