[PATCH 3/3] pagewalk: use lockdep_assert_held for locking validation

[Christoph Hellwig]

Use lockdep to check for held locks instead of using home grown
asserts.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 mm/pagewalk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 28510fc0dde1..9ec1885ceed7 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -319,7 +319,7 @@ int walk_page_range(struct mm_struct *mm, unsigned long 
start,
        if (!walk.mm)
                return -EINVAL;
 
-       VM_BUG_ON_MM(!rwsem_is_locked(&walk.mm->mmap_sem), walk.mm);
+       lockdep_assert_held(&walk.mm->mmap_sem);
 
        vma = find_vma(walk.mm, start);
        do {
@@ -369,7 +369,7 @@ int walk_page_vma(struct vm_area_struct *vma, const struct 
mm_walk_ops *ops,
        if (!walk.mm)
                return -EINVAL;
 
-       VM_BUG_ON(!rwsem_is_locked(&vma->vm_mm->mmap_sem));
+       lockdep_assert_held(&walk.mm->mmap_sem);
 
        err = walk_page_test(vma->vm_start, vma->vm_end, &walk);
        if (err > 0)
-- 
2.20.1