From: Yinghai Lu <yinghai@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>,
Tejun Heo <tj@kernel.org>, Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org
Subject: [PATCH] x86: Don't copy per_cpu cpuinfo for BSP two times
Date: Fri, 21 Jan 2011 15:29:54 -0800 [thread overview]
Message-ID: <4D3A16F2.5090902@kernel.org> (raw)
smp_store_cpu_info(0) will do that.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/kernel/smpboot.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
Index: linux-2.6/arch/x86/kernel/smpboot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/smpboot.c
+++ linux-2.6/arch/x86/kernel/smpboot.c
@@ -1071,13 +1071,13 @@ void __init native_smp_prepare_cpus(unsi
preempt_disable();
smp_cpu_index_default();
- memcpy(__this_cpu_ptr(&cpu_info), &boot_cpu_data, sizeof(cpu_info));
- cpumask_copy(cpu_callin_mask, cpumask_of(0));
- mb();
+
/*
* Setup boot CPU information
*/
smp_store_cpu_info(0); /* Final full version of the data */
+ cpumask_copy(cpu_callin_mask, cpumask_of(0));
+ mb();
#ifdef CONFIG_X86_32
boot_cpu_logical_apicid = logical_smp_processor_id();
#endif
next reply other threads:[~2011-01-21 23:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-21 23:29 Yinghai Lu [this message]
2011-01-22 11:13 ` [PATCH] x86: Don't copy per_cpu cpuinfo for BSP two times Borislav Petkov
2011-01-26 10:59 ` [tip:x86/cpu] " tip-bot for Yinghai Lu
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