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[PATCH] lockdep: annotate mm

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

Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ingo Molnar 2006-07-03 00:25:08 -07:00 • committed by Linus Torvalds
commit f20dc5f7c1
2 changed files with 2 additions and 2 deletions
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mm/mremap.c
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@ -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) {