[PATCH 3/4] stack overflow safe kdump ( 2.6.15-rc3-i386) - do_nmi

From: Fernando Luis Vazquez Cao (fernando_at_intellilink.co.jp)
Date: 11/30/05

  • Next message: Arjan van de Ven: "Re: [PATCH 0/9] x86-64 put current in r10" 
    To: "Eric W. Biederman" <ebiederm@xmission.com>
Date:	Wed, 30 Nov 2005 16:36:57 +0900

    crash_nmi_callback is called right after a system crash which might have
    caused by stack overflow, thus smp_processor_id should not be trusted.
    Use the safe replacement safe_smp_processor_id. 

    ---
diff -urNp linux-2.6.15-rc3/arch/i386/kernel/traps.c linux-2.6.15-rc3-sov/arch/i386/kernel/traps.c
--- linux-2.6.15-rc3/arch/i386/kernel/traps.c	2005-11-30 14:51:49.000000000 +0900
+++ linux-2.6.15-rc3-sov/arch/i386/kernel/traps.c	2005-11-30 14:55:57.000000000 +0900
@@ -648,7 +648,7 @@ fastcall void do_nmi(struct pt_regs * re
 
 	nmi_enter();
 
-	cpu = smp_processor_id();
+	cpu = safe_smp_processor_id();
 
 #ifdef CONFIG_HOTPLUG_CPU
 	if (!cpu_online(cpu)) {
-
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