From: Chen Ridong <chenridong@huawei.com>
Date: Fri, 24 Jan 2025 07:35:11 +0000 (+0000)
Subject: memcg: use OFP_PEAK_UNSET instead of -1
X-Git-Tag: v6.15-rc1~81^2~424
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1c81f1a699263aeae9aa1ac777058846c546e3c0;p=thirdparty%2Flinux.git

memcg: use OFP_PEAK_UNSET instead of -1

Patch series "Some cleanup for memcg", v4.


This patch (of 4):

The 'OFP_PEAK_UNSET' has been defined, use it instead of '-1'.

Link: https://lkml.kernel.org/r/20250124073514.2375622-1-chenridong@huaweicloud.com
Link: https://lkml.kernel.org/r/20250124073514.2375622-2-chenridong@huaweicloud.com
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Acked-by: David Finkel <davidf@vimeo.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wang Weiyang <wangweiyang2@huawei.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a037ec92881d5..12f45dd0f64ab 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4013,7 +4013,7 @@ static ssize_t peak_write(struct kernfs_open_file *of, char *buf, size_t nbytes,
 			WRITE_ONCE(peer_ctx->value, usage);
 
 	/* initial write, register watcher */
-	if (ofp->value == -1)
+	if (ofp->value == OFP_PEAK_UNSET)
 		list_add(&ofp->list, watchers);
 
 	WRITE_ONCE(ofp->value, usage);