From: Matthew Wilcox <willy@linux.intel.com>
Date: Tue, 8 Sep 2015 21:59:11 +0000 (-0700)
Subject: ext4: use ext4_get_block_write() for DAX
X-Git-Tag: omap-for-v4.3/fixes-rc1~54^2~123
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e676a4c191653787c3fe851fe3b9f1f33d49dac2;p=pandora-kernel.git

ext4: use ext4_get_block_write() for DAX

DAX relies on the get_block function either zeroing newly allocated
blocks before they're findable by subsequent calls to get_block, or
marking newly allocated blocks as unwritten.  ext4_get_block() cannot
create unwritten extents, but ext4_get_block_write() can.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reported-by: Andy Rudoff <andy.rudoff@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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