Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932546AbcLMEXE (ORCPT ); Mon, 12 Dec 2016 23:23:04 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:35793 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752810AbcLMEXB (ORCPT ); Mon, 12 Dec 2016 23:23:01 -0500 From: Boris Ostrovsky To: catalin.marinas@arm.com, will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, rjw@rjwysocki.net, lenb@kernel.org Cc: x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-acpi@vger.kernel.org, Boris Ostrovsky Subject: [PATCH v2] ACPI/NUMA: Do not map pxm to node when NUMA is turned off Date: Mon, 12 Dec 2016 23:18:29 -0500 Message-Id: <1481602709-18260-1-git-send-email-boris.ostrovsky@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2524 Lines: 85 Otherwise we may unexpectedly reference a non-zero node via, for example, acpi_get_node() while other parts of the kernel assume that only node 0 (which is what NUMA_NO_NODE is supposed to be converted to) is available. Signed-off-by: Boris Ostrovsky --- V2: * Drop __initdata from x86's numa_off * Make numa_off available to drivers/acpi/numa.c for arm64 and IA64 arch/arm64/include/asm/numa.h | 2 ++ arch/arm64/mm/numa.c | 2 +- arch/ia64/include/asm/numa.h | 2 ++ arch/x86/mm/numa.c | 2 +- drivers/acpi/numa.c | 2 +- 5 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm64/include/asm/numa.h b/arch/arm64/include/asm/numa.h index 600887e..bf466d1 100644 --- a/arch/arm64/include/asm/numa.h +++ b/arch/arm64/include/asm/numa.h @@ -15,6 +15,8 @@ extern nodemask_t numa_nodes_parsed __initdata; +extern bool numa_off; + /* Mappings between node number and cpus on that node. */ extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; void numa_clear_node(unsigned int cpu); diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index 4b32168..b388a99 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -35,7 +35,7 @@ static int numa_distance_cnt; static u8 *numa_distance; -static bool numa_off; +bool numa_off; static __init int numa_parse_early_param(char *opt) { diff --git a/arch/ia64/include/asm/numa.h b/arch/ia64/include/asm/numa.h index 2db0a6c..ebef7f4 100644 --- a/arch/ia64/include/asm/numa.h +++ b/arch/ia64/include/asm/numa.h @@ -65,6 +65,8 @@ struct node_cpuid_s { #define local_nodeid (cpu_to_node_map[smp_processor_id()]) +#define numa_off 0 + extern void map_cpu_to_node(int cpu, int nid); extern void unmap_cpu_from_node(int cpu, int nid); extern void numa_clear_node(int cpu); diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 3f35b48..12dcad7 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -19,7 +19,7 @@ #include "numa_internal.h" -int __initdata numa_off; +int numa_off; nodemask_t numa_nodes_parsed __initdata; struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index ce3a7a1..edb0c79 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -70,7 +70,7 @@ int acpi_map_pxm_to_node(int pxm) { int node; - if (pxm < 0 || pxm >= MAX_PXM_DOMAINS) + if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off) return NUMA_NO_NODE; node = pxm_to_node_map[pxm]; -- 1.8.3.1