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| author | Ingo Molnar <mingo@kernel.org> | 2025-03-04 11:19:21 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-04 11:19:21 +0100 |
| commit | cfdaa618defc5ebe1ee6aa5bd40a7ccedffca6de (patch) | |
| tree | fba004535821850f0d10cc4deac3885545083f0c /mm/madvise.c | |
| parent | x86/ia32: Leave NULL selector values 0~3 unchanged (diff) | |
| parent | <linux/sizes.h>: Cover all possible x86 CPU cache sizes (diff) | |
| download | linux-cfdaa618defc5ebe1ee6aa5bd40a7ccedffca6de.tar.gz linux-cfdaa618defc5ebe1ee6aa5bd40a7ccedffca6de.zip | |
Merge branch 'x86/cpu' into x86/asm, to pick up dependent commits
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 49f3a75046f6..08b207f8e61e 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -933,7 +933,16 @@ static long madvise_dontneed_free(struct vm_area_struct *vma, */ end = vma->vm_end; } - VM_WARN_ON(start >= end); + /* + * If the memory region between start and end was + * originally backed by 4kB pages and then remapped to + * be backed by hugepages while mmap_lock was dropped, + * the adjustment for hugetlb vma above may have rounded + * end down to the start address. + */ + if (start == end) + return 0; + VM_WARN_ON(start > end); } if (behavior == MADV_DONTNEED || behavior == MADV_DONTNEED_LOCKED) |