From ce128de6260f86a990ed44a697f26d0859684f28 Mon Sep 17 00:00:00 2001
From: Maxim Patlasov <MPatlasov@parallels.com>
Date: Wed, 2 Oct 2013 21:38:54 +0400
Subject: [PATCH] fuse: writepages: protect secondary requests from fuse file
 release

All async fuse requests must be supplied with extra reference to a fuse
file.  This is necessary to ensure that the fuse file is not released until
all in-flight requests are completed.  Fuse secondary writeback requests
must obey this rule as well.

Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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