From: Tejun Heo <tj@kernel.org>
Date: Sun, 7 Sep 2014 23:04:01 +0000 (+0900)
Subject: bdi: reimplement bdev_inode_switch_bdi()
X-Git-Tag: fixes-against-v3.18-rc2~52^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=018a17bdc8658ad448497c84d4ba21b6985820ec;p=pandora-kernel.git

bdi: reimplement bdev_inode_switch_bdi()

A block_device may be attached to different gendisks and thus
different bdis over time.  bdev_inode_switch_bdi() is used to switch
the associated bdi.  The function assumes that the inode could be
dirty and transfers it between bdis if so.  This is a bit nasty in
that it reaches into bdi internals.

This patch reimplements the function so that it writes out the inode
if dirty.  This is a lot simpler and can be implemented without
exposing bdi internals.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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