From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Thu, 4 Dec 2014 05:15:10 +0000 (-0800)
Subject: f2fs: use rw_semaphore for nat entry lock
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~143^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b26ef98da3387eb57a8a5c1747c6e628948ee0c;p=pandora-kernel.git

f2fs: use rw_semaphore for nat entry lock

Previoulsy, we used rwlock for nat_entry lock.
But, now we have a lot of complex operations in set_node_addr.
(e.g., allocating kernel memories, handling radix_trees, and so on)

So, this patches tries to change spinlock to rw_semaphore to give CPUs to other
threads.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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