[PATCH] x86_64: print processor number in show_regs

From: Zwane Mwaikambo
Date: Fri Jul 15 2005 - 06:04:55 EST


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@xxxxxxxxxxxxxxxx>

Index: linux-2.6.13-rc2-mm1/arch/x86_64/kernel/process.c
===================================================================
RCS file: /home/cvsroot/linux-2.6.13-rc2-mm1/arch/x86_64/kernel/process.c,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 process.c
--- linux-2.6.13-rc2-mm1/arch/x86_64/kernel/process.c 10 Jul 2005 04:38:46 -0000 1.1.1.1
+++ linux-2.6.13-rc2-mm1/arch/x86_64/kernel/process.c 15 Jul 2005 10:54:42 -0000
@@ -272,7 +272,7 @@ void __show_regs(struct pt_regs * regs)

printk("\n");
print_modules();
- printk("Pid: %d, comm: %.20s %s %s\n",
+ printk("CPU: %d Pid: %d, comm: %.20s %s %s\n", smp_processor_id(),
current->pid, current->comm, print_tainted(), system_utsname.release);
printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
printk_address(regs->rip);
-
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