From: Chao Yu <chao2.yu@samsung.com>
Date: Sat, 28 Feb 2015 09:23:30 +0000 (+0800)
Subject: f2fs: fix to issue small discard in real-time mode discard
X-Git-Tag: omap-for-v4.2/o2_dc~90^2~42
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b28c3f94933dae663eeca24637bf9ff962bf02dc;p=pandora-kernel.git

f2fs: fix to issue small discard in real-time mode discard

Now in f2fs, we share functions and structures for batch mode and real-time mode
discard. For real-time mode discard, in shared function add_discard_addrs, we
will use uninitialized trim_minlen in struct cp_control to compare with length
of contiguous free blocks to decide whether skipping discard fragmented freespace
or not, this makes us ignore small discard sometimes. Fix it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Reviewed-by : Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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