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mm/damon: minor cleanup for damon_pa_young

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if need_lock is true but folio_trylock fails, we should return false
instead of NULL to match the return value type exactly. No functional
change intended.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Miaohe Lin 2022-03-16 16:15:28 +08:00 committed by Matthew Wilcox (Oracle)
parent 72e7258874
commit 2a3c4bce3e
1 changed files with 1 additions and 1 deletions
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mm/damon/paddr.c
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@ -152,7 +152,7 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *page_sz)
need_lock = !folio_test_anon(folio) || folio_test_ksm(folio);
if (need_lock && !folio_trylock(folio)) {
folio_put(folio);
return NULL;
return false;
}
rmap_walk(folio, &rwc);