From: Gu Zheng <guz.fnst@cn.fujitsu.com>
Date: Fri, 10 Jan 2014 10:09:14 +0000 (+0800)
Subject: f2fs: use spinlock rather than mutex for better speed
X-Git-Tag: v3.14-rc1~122^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=17b692f60e93f5d417fcdbfd681b0f20f9f31ec8;p=pandora-kernel.git

f2fs: use spinlock rather than mutex for better speed

With the 2 previous changes, all the long time operations are moved out
of the protection region, so here we can use spinlock rather than mutex
(orphan_inode_mutex) for lower overhead.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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