Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 32c99433cfdf7e9c2c5eb9d6ec9ac27350470e16..91f69459d3e8b3bf8075574e145788b0b40c4a6f 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1234,7 +1234,15 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
                next = pmd_addr_end(addr, end);
                if (pmd_trans_huge(*pmd)) {
                        if (next - addr != HPAGE_PMD_SIZE) {
-                               VM_BUG_ON(!rwsem_is_locked(&tlb->mm->mmap_sem));
+#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
                                split_huge_page_pmd(vma->vm_mm, pmd);
                        } else if (zap_huge_pmd(tlb, vma, pmd, addr))
                                goto next;
@@ -1375,7 +1383,7 @@ void unmap_vmas(struct mmu_gather *tlb,
 /**
  * zap_page_range - remove user pages in a given range
  * @vma: vm_area_struct holding the applicable pages
- * @address: starting address of pages to zap
+ * @start: starting address of pages to zap
  * @size: number of bytes to zap
  * @details: details of nonlinear truncation or shared cache invalidation
  *