| From f55fefd1a5a339b1bd08c120b93312d6eb64a9fb Mon Sep 17 00:00:00 2001 |
| From: Jan Kara <jack@suse.cz> |
| Date: Thu, 30 Oct 2014 10:35:00 +1100 |
| Subject: mm: Remove false WARN_ON from pagecache_isize_extended() |
| |
| 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> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| mm/truncate.c | 1 - |
| 1 file changed, 1 deletion(-) |
| |
| --- a/mm/truncate.c |
| +++ b/mm/truncate.c |
| @@ -755,7 +755,6 @@ void pagecache_isize_extended(struct ino |
| 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) |
