+ memcg-use-ofp_peak_unset-instead-of-1.patch added to mm-unstable branch

+ memcg-use-ofp_peak_unset-instead-of-1.patch added to mm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: memcg: use OFP_PEAK_UNSET instead of -1
has been added to the -mm mm-unstable branch.  Its filename is
     memcg-use-ofp_peak_unset-instead-of-1.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcg-use-ofp_peak_unset-instead-of-1.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Chen Ridong <chenridong@huawei.com>
Subject: memcg: use OFP_PEAK_UNSET instead of -1
Date: Fri, 24 Jan 2025 07:35:11 +0000

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>
---

 mm/memcontrol.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memcontrol.c~memcg-use-ofp_peak_unset-instead-of-1
+++ a/mm/memcontrol.c
@@ -4004,7 +4004,7 @@ static ssize_t peak_write(struct kernfs_
 			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);
_

Patches currently in -mm which might be from chenridong@huawei.com are

memcg-use-ofp_peak_unset-instead-of-1.patch
memcg-call-the-free-function-when-allocation-of-pn-fails.patch
memcg-factor-out-the-replace_stock_objcg-function.patch
memcg-add-config_memcg_v1-for-local-functions.patch