[NET]: Allow skb headroom to be overridden

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Previously we added NET_IP_ALIGN so an architecture can override the
padding done to align headers. The next step is to allow the skb
headroom to be overridden.

We currently always reserve 16 bytes to grow into, meaning all DMAs
start 16 bytes into a cacheline. On ppc64 we really want DMA writes to
start on a cacheline boundary, so we increase that headroom to one
cacheline.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Anton Blanchard 2006-03-31 02:27:06 -08:00 • committed by David S. Miller

parent 0803dbed7a

commit 025be81e83

2 changed files with 29 additions and 5 deletions

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29

include/linux/skbuff.h

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