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mm: update stale lock ordering comment for memory-failure.c 

When i_mmap_lock changed to a mutex the locking order in memory failure
was changed to take the sleeping lock first.  But the big fat mm lock
ordering comment (BFMLO) wasn't updated.  Do this here.

Pointed out by Andrew.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andi Kleen 2012-03-21 16:34:09 -07:00 committed by Linus Torvalds
parent 47a133339c
commit 9a3c531df9
1 changed files with 2 additions and 3 deletions
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5
mm/filemap.c
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@ -101,9 +101,8 @@
* ->inode->i_lock (zap_pte_range->set_page_dirty)
* ->private_lock (zap_pte_range->__set_page_dirty_buffers)
*
* (code doesn't rely on that order, so you could switch it around)
* ->tasklist_lock (memory_failure, collect_procs_ao)
* ->i_mmap_mutex
* ->i_mmap_mutex
* ->tasklist_lock (memory_failure, collect_procs_ao)
*/
/*