From: Kefeng Wang <wangkefeng.wang@huawei.com>
Date: Wed, 8 Mar 2023 08:33:11 +0000 (+0800)
Subject: mm/damon/paddr: fix missing folio_sz update in damon_pa_young()
X-Git-Tag: v6.6.17~4922^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=70307b0e297a6634be855c49525ccbea50922a90;p=platform%2Fkernel%2Flinux-rpi.git

mm/damon/paddr: fix missing folio_sz update in damon_pa_young()

The *folio_sz in damon_pa_young() will be used(as last_folio_sz) by
__damon_pa_check_access(), so it's need to be updated, fix missing branch.

Link: https://lkml.kernel.org/r/20230308083311.120951-4-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index b22f6fb..467b991 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -134,10 +134,8 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz)
 	}
 
 	need_lock = !folio_test_anon(folio) || folio_test_ksm(folio);
-	if (need_lock && !folio_trylock(folio)) {
-		folio_put(folio);
-		return false;
-	}
+	if (need_lock && !folio_trylock(folio))
+		goto out;
 
 	rmap_walk(folio, &rwc);