linux-kernel - [tip:x86/bsp-hotplug] x86, hotplug: During CPU0 online, enable x2apic, set_numa

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Message-ID: <tip-27fd185f3d9e83c64b7a596881d7751a638c9683@git.kernel.org>
Date:	Wed, 14 Nov 2012 16:24:42 -0800
From:	tip-bot for Fenghua Yu <fenghua.yu@...el.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	fenghua.yu@...el.com, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/bsp-hotplug] x86, hotplug: During CPU0 online,
  enable x2apic, set_numa_node.

Commit-ID:  27fd185f3d9e83c64b7a596881d7751a638c9683
Gitweb:     http://git.kernel.org/tip/27fd185f3d9e83c64b7a596881d7751a638c9683
Author:     Fenghua Yu <fenghua.yu@...el.com>
AuthorDate: Tue, 13 Nov 2012 11:32:47 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Wed, 14 Nov 2012 15:28:10 -0800

x86, hotplug: During CPU0 online, enable x2apic, set_numa_node.

Previously these functions were not run on the BSP (CPU 0, the boot processor)
since the boot processor init would only be executed before this functionality
was initialized.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
Link: http://lkml.kernel.org/r/1352835171-3958-11-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/cpu/common.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 7505f7b..ca165ac 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1237,7 +1237,7 @@ void __cpuinit cpu_init(void)
 	oist = &per_cpu(orig_ist, cpu);
 
 #ifdef CONFIG_NUMA
-	if (cpu != 0 && this_cpu_read(numa_node) == 0 &&
+	if (this_cpu_read(numa_node) == 0 &&
 	    early_cpu_to_node(cpu) != NUMA_NO_NODE)
 		set_numa_node(early_cpu_to_node(cpu));
 #endif
@@ -1269,8 +1269,7 @@ void __cpuinit cpu_init(void)
 	barrier();
 
 	x86_configure_nx();
-	if (cpu != 0)
-		enable_x2apic();
+	enable_x2apic();
 
 	/*
 	 * set up and load the per-CPU TSS
--
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