tree a4be70eeb5b33829467851904fcdc26522c24a68
parent 788df7322a7543a337c1ea400d38b621346ea78e
author Lennert Buytenhek <buytenh@marvell.com> 1222853592 -0700
committer David S. Miller <davem@davemloft.net> 1222853592 -0700

net: add skb_recycle_check() to enable netdriver skb recycling

This patch adds skb_recycle_check(), which can be used by a network
driver after transmitting an skb to check whether this skb can be
recycled as a receive buffer.

skb_recycle_check() checks that the skb is not shared or cloned, and
that it is linear and its head portion large enough (as determined by
the driver) to be recycled as a receive buffer.  If these conditions
are met, it does any necessary reference count dropping and cleans
up the skbuff as if it just came from __alloc_skb().

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>