From ae8fa2831bbc5092ee9d1b90e623af881cf27140 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Fri, 16 Oct 2009 15:56:01 +1100
Subject: [PATCH] md: remove clumsy usage of do_sync_mapping_range from bitmap
 code

and replace with vfs_fsync which is much neater (but wasn't exported,
or even in existence at the time the code was written).

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NeilBrown <neilb@suse.de>
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