[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>
git-mirror · Jul 3, 2006 · f20dc5f · f20dc5f
1 parent eb4542b
commit f20dc5f
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/mm/memory.c b/mm/memory.c
@@ -503,7 +503,7 @@ static int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
 		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 {
 		/*

diff --git 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) {