From: Wu Fengguang <fengguang.wu@intel.com>
Date: Tue, 16 Jun 2009 22:31:21 +0000 (-0700)
Subject: readahead: remove one unnecessary radix tree lookup
X-Git-Tag: v2.6.31-rc1~299^2~174
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=caca7cb748571a5b39943a9b3e7081feef055e5e;p=pandora-kernel.git

readahead: remove one unnecessary radix tree lookup

(hit_readahead_marker != 0) means the page at @offset is present, so we
can search for non-present page starting from @offset+1.

Reported-by: Xu Chenfeng <xcf@ustc.edu.cn>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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