From f11fcae8401a3175f528e2f7917362645d570111 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 15 Sep 2009 09:53:35 +0200
Subject: [PATCH] writeback: only use bdi_writeback_all() for WB_SYNC_NONE
 writeout

Data integrity writeback must use bdi_start_writeback() and ensure
that wbc->sb and wbc->bdi are set.

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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