From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CD77D6465 for ; Tue, 22 Mar 2022 21:47:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A78BC340EC; Tue, 22 Mar 2022 21:47:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1647985642; bh=PpEsN8mcG7GQQNSB7nA/+rtCMUs7PJFXq1LdZYof+Gw=; h=Date:To:From:In-Reply-To:Subject:From; b=0zKe3ATtNLBpqmeRaR7IDapsKUnpR85jVv5gwvkEEC9qncwhmFWxJLcEQGz7aEodb EgsUCZEvPwzf3gm+mc2T5bqrPHcR/r5rc3qaFB3HZzfHUzHdcceqKJzTb3p/d8KzM+ LQyUAqIDgBNFF8Bi6JfxDiWofzDHSTEhEsDfd4m8= Date: Tue, 22 Mar 2022 14:47:22 -0700 To: osalvador@suse.de,david@redhat.com,linmiaohe@huawei.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220322143803.04a5e59a07e48284f196a2f9@linux-foundation.org> Subject: [patch 174/227] mm/memory_hotplug: clean up try_offline_node Message-Id: <20220322214722.9A78BC340EC@smtp.kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: From: Miaohe Lin Subject: mm/memory_hotplug: clean up try_offline_node We can use helper macro node_spanned_pages to check whether node spans pages. And we can change the parameter of check_cpu_on_node to nid as that's what it really cares. Thus we can further get rid of the local variable pgdat and improve the readability a bit. Link: https://lkml.kernel.org/r/20220207133643.23427-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Reviewed-by: David Hildenbrand Reviewed-by: Oscar Salvador Signed-off-by: Andrew Morton --- mm/memory_hotplug.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) --- a/mm/memory_hotplug.c~mm-memory_hotplug-clean-up-try_offline_node +++ a/mm/memory_hotplug.c @@ -2005,12 +2005,12 @@ static int get_nr_vmemmap_pages_cb(struc return mem->nr_vmemmap_pages; } -static int check_cpu_on_node(pg_data_t *pgdat) +static int check_cpu_on_node(int nid) { int cpu; for_each_present_cpu(cpu) { - if (cpu_to_node(cpu) == pgdat->node_id) + if (cpu_to_node(cpu) == nid) /* * the cpu on this node isn't removed, and we can't * offline this node. @@ -2044,7 +2044,6 @@ static int check_no_memblock_for_node_cb */ void try_offline_node(int nid) { - pg_data_t *pgdat = NODE_DATA(nid); int rc; /* @@ -2052,7 +2051,7 @@ void try_offline_node(int nid) * offline it. A node spans memory after move_pfn_range_to_zone(), * e.g., after the memory block was onlined. */ - if (pgdat->node_spanned_pages) + if (node_spanned_pages(nid)) return; /* @@ -2064,7 +2063,7 @@ void try_offline_node(int nid) if (rc) return; - if (check_cpu_on_node(pgdat)) + if (check_cpu_on_node(nid)) return; /* _