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mm: Fix comment before truncate_setsize()

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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>
This commit is contained in:
Jan Kara 2014-11-07 08:29:25 +11:00 committed by Dave Chinner
parent 5d11fb4b9a
commit 77783d0642
1 changed files with 3 additions and 2 deletions
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5
mm/truncate.c
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@ -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)
{