linux-kernel - [PATCH] mm/page_counter: use page_counter_read in page_counter_set

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Message-ID: <20201113141048.GA178922@rlk>
Date:   Fri, 13 Nov 2020 22:10:48 +0800
From:   Hui Su <sh_def@....com>
To:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     sh_def@....com
Subject: [PATCH] mm/page_counter: use page_counter_read in
 page_counter_set_max

use page_counter_read() in page_counter_set_max().

Signed-off-by: Hui Su <sh_def@....com>
---
 mm/page_counter.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_counter.c b/mm/page_counter.c
index b24a60b28bb0..c6860f51b6c6 100644
--- a/mm/page_counter.c
+++ b/mm/page_counter.c
@@ -183,14 +183,14 @@ int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages)
 		 * the limit, so if it sees the old limit, we see the
 		 * modified counter and retry.
 		 */
-		usage = atomic_long_read(&counter->usage);
+		usage = page_counter_read(counter);
 
 		if (usage > nr_pages)
 			return -EBUSY;
 
 		old = xchg(&counter->max, nr_pages);
 
-		if (atomic_long_read(&counter->usage) <= usage)
+		if (page_counter_read(counter) <= usage)
 			return 0;
 
 		counter->max = old;
-- 
2.29.0