From: Jan Kara <jack@suse.cz>
Date: Wed, 29 Oct 2014 23:35:00 +0000 (+1100)
Subject: mm: Remove false WARN_ON from pagecache_isize_extended()
X-Git-Tag: v3.2.65~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=9b0899aa3d6f6a65ac3af131193be792e29373e9;hp=9b0899aa3d6f6a65ac3af131193be792e29373e9

mm: Remove false WARN_ON from pagecache_isize_extended()

commit f55fefd1a5a339b1bd08c120b93312d6eb64a9fb upstream.

The WARN_ON checking whether i_mutex is held in
pagecache_isize_extended() was wrong because some filesystems (e.g.
XFS) use different locks for serialization of truncates / writes. So
just remove the check.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---