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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D3A16F2.5090902@kernel.org \
--to=yinghai@kernel.org \
--cc=bp@alien8.de \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox