From: Jack Steiner <steiner@sgi.com>
To: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.co
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] x86, UV: Fix APICID shift for westmere processors
Date: Mon, 10 Jan 2011 13:52:11 -0600 [thread overview]
Message-ID: <20110110195210.GA18737@sgi.com> (raw)
Westmere processors use a different algorithm for
assigning APICIDs on SGI UV systems. The location of the
node number within the apicid is now a function of the
processor type.
Signed-off-by: Jack Steiner <steiner@sgi.com>
---
arch/x86/kernel/apic/x2apic_uv_x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux/arch/x86/kernel/apic/x2apic_uv_x.c
===================================================================
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c 2010-12-31 10:53:26.878105424 -0600
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c 2010-12-31 10:54:45.291099878 -0600
@@ -378,7 +378,7 @@ struct apic __refdata apic_x2apic_uv_x =
static __cpuinit void set_x2apic_extra_bits(int pnode)
{
- __get_cpu_var(x2apic_extra_bits) = (pnode << 6);
+ __get_cpu_var(x2apic_extra_bits) = (pnode << uvh_apicid.s.pnode_shift);
}
/*
next reply other threads:[~2011-01-10 19:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-10 19:52 Jack Steiner [this message]
2011-01-11 12:28 ` [tip:x86/urgent] x86, UV: Fix APICID shift for Westmere processors tip-bot for Jack Steiner
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=20110110195210.GA18737@sgi.com \
--to=steiner@sgi.com \
--cc=hpa@zytor.co \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.