git.cascardo.info Git - cascardo/linux.git/commit

author	Eric Dumazet <eric.dumazet@gmail.com>
	Thu, 23 Sep 2010 00:46:11 +0000 (00:46 +0000)
committer	David S. Miller <davem@davemloft.net>
	Mon, 27 Sep 2010 01:27:15 +0000 (18:27 -0700)
commit	c5256c51232d8312755e8de2b514c426b19b101a
tree	95312aa92634472fc2329032890203dfddd0b776	tree \| snapshot
parent	bba50b99b2410e863b38afdcd0280eb37f8a8bcc	commit \| diff

net: propagate NETIF_F_HIGHDMA to vlans

Automatically allows vlans to get NETIF_F_HIGHDMA if underlying device
supports it.

On 32bit arches (and more precisely if CONFIG_HIGHMEM is enabled), it
can help to reduce cost of illegal_highdma() and __skb_linearize()
calls.

Tested on tg3 , bnx2, bonding, this worked very well.

This is a generalization of a patch provided by Yi Zou & Jeff Kirsher.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>