From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Fri, 3 Jul 2015 14:40:43 +0000 (-0400)
Subject: dax: bdev_direct_access() may sleep
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~6^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43c3dd08da890e458f670b4fc0630513fb405620;p=pandora-kernel.git

dax: bdev_direct_access() may sleep

The brd driver is the only in-tree driver that may sleep currently.
After some discussion on linux-fsdevel, we decided that any driver
may choose to sleep in its ->direct_access method.  To ensure that all
callers of bdev_direct_access() are prepared for this, add a call
to might_sleep().

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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