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mm/memory-failure.c: fix spinlock vs mutex order

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We cannot take a mutex while holding a spinlock, so flip the order and
fix the locking documentation.

Signed-off-by: Peter Zijlstra <[email protected]>
Acked-by: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Peter Zijlstra 2011-06-27 16:18:09 -07:00 • committed by Linus Torvalds
commit 9b679320a5
2 changed files with 8 additions and 18 deletions
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5
mm/rmap.c
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@ -38,9 +38,8 @@
* in arch-dependent flush_dcache_mmap_lock,
* within inode_wb_list_lock in __sync_single_inode)
*
* (code doesn't rely on that order so it could be switched around)
* ->tasklist_lock
* anon_vma->mutex (memory_failure, collect_procs_anon)
* anon_vma->mutex,mapping->i_mutex (memory_failure, collect_procs_anon)
* ->tasklist_lock
* pte map lock
*/