From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752495AbdDCKAe (ORCPT ); Mon, 3 Apr 2017 06:00:34 -0400 Received: from terminus.zytor.com ([65.50.211.136]:53207 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752430AbdDCKAc (ORCPT ); Mon, 3 Apr 2017 06:00:32 -0400 Date: Mon, 3 Apr 2017 02:58:22 -0700 From: tip-bot for Wei Yang Message-ID: Cc: bp@suse.de, hpa@zytor.com, tglx@linutronix.de, x86@kernel.org, richard.weiyang@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org Reply-To: bp@suse.de, hpa@zytor.com, tglx@linutronix.de, x86@kernel.org, richard.weiyang@gmail.com, mingo@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20170314030801.13656-2-richard.weiyang@gmail.com> References: <20170314030801.13656-2-richard.weiyang@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/mm] x86/mm/numa: Remove numa_nodemask_from_meminfo() Git-Commit-ID: 474aeffd88b87746a75583f356183d5c6caa4213 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 474aeffd88b87746a75583f356183d5c6caa4213 Gitweb: http://git.kernel.org/tip/474aeffd88b87746a75583f356183d5c6caa4213 Author: Wei Yang AuthorDate: Tue, 14 Mar 2017 11:08:01 +0800 Committer: Thomas Gleixner CommitDate: Mon, 3 Apr 2017 11:54:37 +0200 x86/mm/numa: Remove numa_nodemask_from_meminfo() numa_nodemask_from_meminfo() generates a nodemask of nodes which have memory according to a meminfo descriptor. The two callsites of that function both set bits in copies of the numa_nodes_parsed nodemask. In both cases, the information in supplied numa_meminfo is a subset of numa_nodes_parsed. So setting those bits again is not really necessary. Here are the three call paths which show that the supplied numa_meminfo argument describes memory regions in nodes which are already in numa_nodes_parsed: x86_numa_init() numa_init() Case 1: acpi_numa_init() acpi_parse_memory_affinity() numa_add_memblk() node_set(numa_nodes_parsed) acpi_parse_slit() acpi_numa_slit_init() numa_set_distance() numa_alloc_distance() numa_nodemask_from_meminfo() Case 2: amd_numa_init() numa_add_memblk() node_set(numa_nodes_parsed) Case 3 dummy_numa_init() node_set(numa_nodes_parsed) numa_add_memblk() numa_register_memblks() numa_nodemask_from_meminfo() Thus, in all three cases, the respective bit in numa_nodes_parsed is set, which means it is not necessary to set it again in a copy of numa_nodes_parsed. So remove that function. Signed-off-by: Wei Yang Cc: x86-ml Link: http://lkml.kernel.org/r/20170314030801.13656-2-richard.weiyang@gmail.com [ Heavily massage commit message. ] Signed-off-by: Borislav Petkov Signed-off-by: Thomas Gleixner --- arch/x86/mm/numa.c | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 93671d8..175f54a 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -314,20 +314,6 @@ int __init numa_cleanup_meminfo(struct numa_meminfo *mi) return 0; } -/* - * Set nodes, which have memory in @mi, in *@nodemask. - */ -static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask, - const struct numa_meminfo *mi) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(mi->blk); i++) - if (mi->blk[i].start != mi->blk[i].end && - mi->blk[i].nid != NUMA_NO_NODE) - node_set(mi->blk[i].nid, *nodemask); -} - /** * numa_reset_distance - Reset NUMA distance table * @@ -347,16 +333,12 @@ void __init numa_reset_distance(void) static int __init numa_alloc_distance(void) { - nodemask_t nodes_parsed; size_t size; int i, j, cnt = 0; u64 phys; /* size the new table and allocate it */ - nodes_parsed = numa_nodes_parsed; - numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); - - for_each_node_mask(i, nodes_parsed) + for_each_node_mask(i, numa_nodes_parsed) cnt = i; cnt++; size = cnt * cnt * sizeof(numa_distance[0]); @@ -535,7 +517,6 @@ static int __init numa_register_memblks(struct numa_meminfo *mi) /* Account for nodes with cpus and no memory */ node_possible_map = numa_nodes_parsed; - numa_nodemask_from_meminfo(&node_possible_map, mi); if (WARN_ON(nodes_empty(node_possible_map))) return -EINVAL;