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| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2022-03-22 14:48:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-22 15:57:12 -0700 |
| commit | 242e10a09f2637f61356a739ea9ed69235a47ce5 (patch) | |
| tree | 3bdee14c010d58ba826bb348fcd89b1e53102ffb /mm/damon/vaddr.c | |
| parent | 1971bd630452e943380429336a851c55b027eed1 (diff) | |
| download | linux-242e10a09f2637f61356a739ea9ed69235a47ce5.tar.gz linux-242e10a09f2637f61356a739ea9ed69235a47ce5.tar.bz2 linux-242e10a09f2637f61356a739ea9ed69235a47ce5.zip | |
mm/damon: remove redundant page validation
It will never get a NULL page by pte_page() as discussed in thread [1],
thus remove the redundant page validation to fix below Smatch static
checker warning.
mm/damon/vaddr.c:405 damon_hugetlb_mkold()
warn: 'page' can't be NULL.
[1] https://lore.kernel.org/linux-mm/20220106091200.GA14564@kili/
Link: https://lkml.kernel.org/r/6d32f7d201b8970d53f51b6c5717d472aed2987c.1642386715.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/damon/vaddr.c')
| -rw-r--r-- | mm/damon/vaddr.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index f98edb90a873..6d3454dd3204 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -402,9 +402,6 @@ static void damon_hugetlb_mkold(pte_t *pte, struct mm_struct *mm, pte_t entry = huge_ptep_get(pte); struct page *page = pte_page(entry); - if (!page) - return; - get_page(page); if (pte_young(entry)) { @@ -564,9 +561,6 @@ static int damon_young_hugetlb_entry(pte_t *pte, unsigned long hmask, goto out; page = pte_page(entry); - if (!page) - goto out; - get_page(page); if (pte_young(entry) || !page_is_idle(page) || |