[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/memory.c b/mm/memory.c
index 7e2a4b1580e3..c1e14c9e67e4 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -503,7 +503,7 @@ again:
                 return -ENOMEM;
         src_pte = pte_offset_map_nested(src_pmd, addr);
         src_ptl = pte_lockptr(src_mm, src_pmd);
-        spin_lock(src_ptl);
+        spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING);
 
         do {
                 /*