From 149728e91349f269d6fc82b4ca2552645dfa7d2c Mon Sep 17 00:00:00 2001 From: Anshuman Khandual Date: Fri, 8 Sep 2017 16:13:32 -0700 Subject: [PATCH] mm/mempolicy.c: remove BUG_ON() checks for VMA inside mpol_misplaced() VMA and its address bounds checks are too late in this function. They must have been verified earlier in the page fault sequence. Hence just remove them. Link: http://lkml.kernel.org/r/20170901130137.7617-1-khandual@linux.vnet.ibm.com Signed-off-by: Anshuman Khandual Suggested-by: Vlastimil Babka Acked-by: Vlastimil Babka Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/mempolicy.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 1f5db48..006ba62 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2233,17 +2233,12 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long int polnid = -1; int ret = -1; - BUG_ON(!vma); - pol = get_vma_policy(vma, addr); if (!(pol->flags & MPOL_F_MOF)) goto out; switch (pol->mode) { case MPOL_INTERLEAVE: - BUG_ON(addr >= vma->vm_end); - BUG_ON(addr < vma->vm_start); - pgoff = vma->vm_pgoff; pgoff += (addr - vma->vm_start) >> PAGE_SHIFT; polnid = offset_il_node(pol, pgoff); -- 2.7.4