From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Fri, 13 Jun 2014 04:07:31 +0000 (+0900)
Subject: f2fs: fix not to allocate unnecessary blocks during fallocate
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~325^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98397ff3cddcfdedd2ba1701bd30a73c1d733769;p=pandora-kernel.git

f2fs: fix not to allocate unnecessary blocks during fallocate

This patch fixes the fallocate bug like below. (See xfstests/255)

In fallocate(fd, 0, 20480),
expand_inode_data processes
	for (index = pg_start; index <= pg_end; index++) {
		f2fs_reserve_block();
		...
	}

So, even though fallocate requests 20480, 5 blocks, f2fs allocates 6 blocks
including pg_end.
So, this patch adds one condition to avoid block allocation.

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