| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 96/96] mm: Remove false WARN_ON from pagecache_isize_extended() | Date | Mon, 15 Dec 2014 11:26:56 -0800 |
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3.13.11-ckt13 -stable review patch. If anyone has any objections, please let me know.
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From: Jan Kara <jack@suse.cz>
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> Buglink: http://bugs.launchpad.net/bugs/1402764 Cc: Stefan Bader <stefan.bader@canonical.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- mm/truncate.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/mm/truncate.c b/mm/truncate.c index 855c38c..ac18edc 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -649,7 +649,6 @@ void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to) struct page *page; pgoff_t index; - WARN_ON(!mutex_is_locked(&inode->i_mutex)); WARN_ON(to > inode->i_size); if (from >= to || bsize == PAGE_CACHE_SIZE) -- 1.9.1
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