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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Kara 2014-10-30 10:35:00 +11:00 committed by Greg Kroah-Hartman
parent 2d1fef447d
commit b089fe5b6d
1 changed files with 0 additions and 1 deletions
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mm/truncate.c
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@ -603,7 +603,6 @@ 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)