From: Heesub Shin <heesub.shin@samsung.com>
Date: Sat, 13 Dec 2014 00:57:21 +0000 (-0800)
Subject: mm/zbud: init user ops only when it is needed
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~97^2~32
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1dd61aa31cb5a64fe294c32424d9602fdb7317b0;p=pandora-kernel.git

mm/zbud: init user ops only when it is needed

When zbud is initialized through the zpool wrapper, pool->ops which
points to user-defined operations is always set regardless of whether it
is specified from the upper layer. This causes zbud_reclaim_page() to
iterate its loop for evicting pool pages out without any gain.

This patch sets the user-defined ops only when it is needed, so that
zbud_reclaim_page() can bail out the reclamation loop earlier if there
is no user-defined operations specified.

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>
Acked-by: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjennings@variantweb.net>
Cc: Sunae Seo <sunae.seo@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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