diff options
author | Patrick McHardy <kaber@trash.net> | 2008-07-08 15:36:57 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-07-08 15:36:57 -0700 |
commit | 11a100f844f6096787ab20e19f17d72abc957a8f (patch) | |
tree | 9dd9f8578727783dc1d321a822402ee6ca83cd10 /block | |
parent | 9bb8582efb555521c7eec595ebd34e835ddc34b8 (diff) |
vlan: avoid header copying and linearisation where possible
- vlan_dev_reorder_header() is only called on the receive path after
calling skb_share_check(). This means we can use skb_cow() since
all we need is a writable header.
- vlan_dev_hard_header() includes a work-around for some apparently
broken out of tree MPLS code. The hard_header functions can expect
to always have a headroom of at least there own hard_header_len
available, so the reallocation check is unnecessary.
- __vlan_put_tag() can use skb_cow_head() to avoid the skb_unshare()
copy when the header is writable.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions