From: Eric Dumazet <edumazet@google.com>
Date: Thu, 19 Apr 2012 09:38:17 +0000 (+0000)
Subject: net: allow better page reuse in splice(sock -> pipe)
X-Git-Tag: v3.5-rc1~109^2~323
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e66e9a31474dcce5be6f1186dc933d8a991c707b;p=pandora-kernel.git

net: allow better page reuse in splice(sock -> pipe)

splice() from socket to pipe needs linear_to_page() helper to transfert
skb header to part of page.

We can reset the offset in the current sk->sk_sndmsg_page if we are the
last user of the page.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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