diff options
| author |   Jan Kara <jack@suse.cz> | 2014-11-07 08:29:25 +1100 |
|---|---|---|
| committer |   Dave Chinner <david@fromorbit.com> | 2014-11-07 08:29:25 +1100 |
| commit | 77783d06427293b2d711c45cfd4abc6494a1af9c (patch) | |
| tree | 5d8eed71173edc1dc005af5e2dc3136ce5512e72 /mm | |
| parent | xfs: rework zero range to prevent invalid i_size updates (diff) | |
| download | linux-dev-77783d06427293b2d711c45cfd4abc6494a1af9c.tar.xz linux-dev-77783d06427293b2d711c45cfd4abc6494a1af9c.zip | |
mm: Fix comment before truncate_setsize()
XFS doesn't always hold i_mutex when calling truncate_setsize() and it
uses a different lock to serialize truncates and writes. So fix the
comment before truncate_setsize().
Reported-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/truncate.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/truncate.c b/mm/truncate.c index c646084e5eec..f1e4d6052369 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -715,8 +715,9 @@ EXPORT_SYMBOL(truncate_pagecache); * necessary) to @newsize. It will be typically be called from the filesystem's * setattr function when ATTR_SIZE is passed in. * - * Must be called with inode_mutex held and before all filesystem specific - * block truncation has been performed. + * Must be called with a lock serializing truncates and writes (generally + * i_mutex but e.g. xfs uses a different lock) and before all filesystem + * specific block truncation has been performed. */ void truncate_setsize(struct inode *inode, loff_t newsize) { |