From 408a60eddd206134fd306dfbc53bbde093b8deb0 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Sat, 30 Nov 2019 17:50:37 -0800 Subject: [PATCH] mm/mmap.c: remove a never-triggered warning in __vma_adjust() The upper level of "if" makes sure (end >= next->vm_end), which means there are only two possibilities: 1) end == next->vm_end 2) end > next->vm_end remove_next is assigned to be (1 + end > next->vm_end). This means if remove_next is 1, end must equal to next->vm_end. The VM_WARN_ON will never trigger. Link: http://lkml.kernel.org/r/20190912063126.13250-1-richardw.yang@linux.intel.com Signed-off-by: Wei Yang Reviewed-by: Andrew Morton Cc: Vlastimil Babka Cc: Yang Shi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/mmap.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index a7d8c84d19b7..e27bc5dcd6c4 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -769,8 +769,6 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start, remove_next = 1 + (end > next->vm_end); VM_WARN_ON(remove_next == 2 && end != next->vm_next->vm_end); - VM_WARN_ON(remove_next == 1 && - end != next->vm_end); /* trim end to next, for case 6 first pass */ end = next->vm_end; }