From: Jan Kara <j...@suse.cz>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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 <j...@suse.cz>
Reviewed-by: Dave Chinner <dchin...@redhat.com>
Signed-off-by: Dave Chinner <da...@fromorbit.com>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
mm/truncate.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/truncate.c b/mm/truncate.c
index 7dfb7c70fd4b..827ad8d2b5cd 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -697,7 +697,6 @@ 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)
--
2.1.3
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