From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-180.mta1.migadu.com (out-180.mta1.migadu.com [95.215.58.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7BA363E2AC9 for ; Mon, 13 Jul 2026 09:38:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783935497; cv=none; b=oQ/L8qn4E5UKO1OacC3DfN/6tCca4ofhfm0KgMl1RsPiywriUoc1GHxhyYmu9ErNchmriW+ibZeDRcSVzQE3jcbJ1m65R6SeOSngHcxfccZEy//ccm6o+0IA5ZX8t+smbSuN8FZSjeJ6q4qFgBA7+lvhLkLpoaQcnu/cepaHzM0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783935497; c=relaxed/simple; bh=WyCQypFRFdFymrXZwQWMUqNFTWvD+Fc31glBT9ORvPM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=jxVCoTCZ1FffyvagIT3publBX19NbuP6MrUGZqW0aERRy06jv5JLUaoKifg9fqQ27JXmdXdYNWHX8vLLb6XVh9uk0i9NF/S68EnuET2xDKpY0iUUoNztQJy3oJVNJ+iQcbkwy3EcOuLw9sNusyJsmwVwLkXJ+1NwcNap1lZawjU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=JIDk3tx6; arc=none smtp.client-ip=95.215.58.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="JIDk3tx6" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1783935477; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=rvVsmNUiaRCk48qdsU4ef5SiZPZfdpdcGy8a4cIbIvw=; b=JIDk3tx6AB3lAyGSfAFF9Get8nRGjzzD8GOI/dTjvMuDc1MEDecxUAeE8KNeNO9wCUw3wq V/H3MTaTZxqBmhIhrSplO6cWnP+gdEV5EGQro5wriG9oC1W+cqGKExJDQ3v7fTfSDQdKcj MsJU4thh9KxUPUoR6VkiPCKeuvZGEhc= From: Guopeng Zhang To: Andrew Morton , Johannes Weiner Cc: Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Guopeng Zhang Subject: [PATCH] mm: memcg-v1: make mem_cgroup_oom_notify_cb() return void Date: Mon, 13 Jul 2026 17:37:37 +0800 Message-ID: <20260713093737.3299646-1-guopeng.zhang@linux.dev> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: Guopeng Zhang Commit 7d74b06f240f ("memcg: use for_each_mem_cgroup") replaced the mem_cgroup_walk_tree() call in mem_cgroup_oom_notify() with for_each_mem_cgroup_tree(), but left mem_cgroup_oom_notify_cb() with the int return type required by the old callback interface. The function now has a single direct caller and no failure path. Make it return void. Signed-off-by: Guopeng Zhang --- mm/memcontrol-v1.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c index e8b6e1560278..73bea1b5c8dd 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -752,7 +752,7 @@ static int compare_thresholds(const void *a, const void *b) return 0; } -static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg) +static void mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg) { struct mem_cgroup_eventfd_list *ev; @@ -762,7 +762,6 @@ static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg) eventfd_signal(ev->eventfd); spin_unlock(&memcg_oom_lock); - return 0; } static void mem_cgroup_oom_notify(struct mem_cgroup *memcg) -- 2.43.0