From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Date: Tue, 6 Sep 2005 22:16:16 +0000 (-0700)
Subject: [PATCH] x86_64: print processor number in show_regs
X-Git-Tag: v2.6.14-rc1~743
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c078d3266e58a3edd698b9f143f78fc585679031;p=linux-2.6

[PATCH] x86_64: print processor number in show_regs

Up to date I've been using the GS value to determine the processor number
in dumps from show_regs, however this can be cumbersome to do if you don't
have the vmlinux to verify with the address of cpu_pda, how about the
following?  I considered using hard_smp_processor_id for robustness but we
already dereference current so we're already relying on MSR_GS_BASE being
sane.

Signed-off-by: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 7577f9d7a7..8661f82ac7 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -310,6 +310,7 @@ void __show_regs(struct pt_regs * regs)
 
 void show_regs(struct pt_regs *regs)
 {
+	printk("CPU %d:", smp_processor_id());
 	__show_regs(regs);
 	show_trace(&regs->rsp);
 }