From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: [patch 120/155] mm: vmpressure: use mem_cgroup_is_root API Date: Wed, 01 Apr 2020 21:10:02 -0700 Message-ID: <20200402041002.qYammk-U7%akpm@linux-foundation.org> References: <20200401210155.09e3b9742e1c6e732f5a7250@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.99]:34974 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725789AbgDBEKD (ORCPT ); Thu, 2 Apr 2020 00:10:03 -0400 In-Reply-To: <20200401210155.09e3b9742e1c6e732f5a7250@linux-foundation.org> Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: akpm@linux-foundation.org, david@redhat.com, linux-mm@kvack.org, mhocko@suse.com, mm-commits@vger.kernel.org, rientjes@google.com, torvalds@linux-foundation.org, yang.shi@linux.alibaba.com From: Yang Shi Subject: mm: vmpressure: use mem_cgroup_is_root API Use mem_cgroup_is_root() API to check if memcg is root memcg instead of open coding. Link: http://lkml.kernel.org/r/1581398649-125989-2-git-send-email-yang.shi@linux.alibaba.com Signed-off-by: Yang Shi Reviewed-by: Andrew Morton Reviewed-by: David Hildenbrand Acked-by: Michal Hocko Acked-by: David Rientjes Signed-off-by: Andrew Morton --- mm/vmpressure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/vmpressure.c~mm-vmpressure-use-mem_cgroup_is_root-api +++ a/mm/vmpressure.c @@ -280,7 +280,7 @@ void vmpressure(gfp_t gfp, struct mem_cg enum vmpressure_levels level; /* For now, no users for root-level efficiency */ - if (!memcg || memcg == root_mem_cgroup) + if (!memcg || mem_cgroup_is_root(memcg)) return; spin_lock(&vmpr->sr_lock); _