[PATCH] lockdep: annotate mm

Teach special (recursive) locking code to the lock validator.  Has no effect
on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/mremap.c b/mm/mremap.c
index 1903bdf65e42..7c15cf3373ad 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -97,7 +97,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
         new_pte = pte_offset_map_nested(new_pmd, new_addr);
         new_ptl = pte_lockptr(mm, new_pmd);
         if (new_ptl != old_ptl)
-                spin_lock(new_ptl);
+                spin_lock_nested(new_ptl, SINGLE_DEPTH_NESTING);
 
         for (; old_addr < old_end; old_pte++, old_addr += PAGE_SIZE,
                                    new_pte++, new_addr += PAGE_SIZE) {