[PATCH] mm: Remove false WARN_ON from pagecache_isize_extended()

[Jan Kara]

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@xxxxxxx>
---
 mm/truncate.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/truncate.c b/mm/truncate.c
index 261eaf6e5a19..c646084e5eec 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -755,7 +755,6 @@ 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)
-- 
1.8.1.4


--IJpNTDwzlM2Ie8A6--
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