From: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Spotted during PUD support review.
Reported-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
---
mm/memory.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c
index a2eaeef..324b40b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1185,15 +1185,7 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
next = pmd_addr_end(addr, end);
if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) {
if (next - addr != HPAGE_PMD_SIZE) {
-#ifdef CONFIG_DEBUG_VM
- if (!rwsem_is_locked(&tlb->mm->mmap_sem)) {
- pr_err("%s: mmap_sem is unlocked! addr=0x%lx end=0x%lx vma->vm_start=0x%lx vma->vm_end=0x%lx\n",
- __func__, addr, end,
- vma->vm_start,
- vma->vm_end);
- BUG();
- }
-#endif
+ VM_BUG_ON_VMA(!rwsem_is_locked(&tlb->mm->mmap_sem), vma);
split_huge_pmd(vma, pmd, addr);
} else if (zap_huge_pmd(tlb, vma, pmd, addr))
goto next;
--
2.7.0.rc3
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