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authorPaolo Abeni <pabeni@redhat.com>2018-12-21 21:03:15 +0300
committerDavid S. Miller <davem@davemloft.net>2018-12-21 21:24:54 +0300
commit682ec859518d73435cc924d816da2953343241c1 (patch)
tree11fb43824d249c87afe417bef0b9c372077972b4 /net/core
parentd312d0a6846a4553bd955afd414f8f55398ece07 (diff)
downloadlinux-682ec859518d73435cc924d816da2953343241c1.tar.xz
net: minor cleanup in skb_ext_add()
When the extension to be added is already present, the only skb field we may need to update is 'extensions': we can reorder the code and avoid a branch. v1 -> v2: - be sure to flag the newly added extension as active Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/skbuff.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e1d88762f659..37317ffec146 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5666,11 +5666,8 @@ void *skb_ext_add(struct sk_buff *skb, enum skb_ext_id id)
if (!new)
return NULL;
- if (__skb_ext_exist(new, id)) {
- if (old != new)
- skb->extensions = new;
+ if (__skb_ext_exist(new, id))
goto set_active;
- }
newoff = new->chunks;
} else {
@@ -5684,8 +5681,8 @@ void *skb_ext_add(struct sk_buff *skb, enum skb_ext_id id)
newlen = newoff + skb_ext_type_len[id];
new->chunks = newlen;
new->offset[id] = newoff;
- skb->extensions = new;
set_active:
+ skb->extensions = new;
skb->active_extensions |= 1 << id;
return skb_ext_get_ptr(new, id);
}