From 8add71ca3fd67c5f222622711f95cfd6cec2a996 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 2 Feb 2015 09:53:56 +1100
Subject: [PATCH] xfs: factor out a xfs_update_prealloc_flags() helper

This logic is duplicated in xfs_file_fallocate and xfs_ioc_space, and
we'll need another copy of it for pNFS block support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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