[PATCH] stack overflow safe kdump: crash: use safe_smp_processor_id()

Substitute "smp_processor_id" with the stack overflow-safe
"safe_smp_processor_id" in the reboot path to the second kernel.

[akpm@osdl.org: build fix]
Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp>
Looks-reasonable-to: Andi Kleen <ak@muc.de>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 67d297dc100..2dfc049dafa 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -23,6 +23,7 @@
 #include <asm/hw_irq.h>
 #include <asm/apic.h>
 #include <asm/kdebug.h>
+#include <asm/smp.h>
 
 #include <mach_ipi.h>
 
@@ -88,7 +89,7 @@ static void crash_save_self(struct pt_regs *regs)
 {
         int cpu;
 
-        cpu = smp_processor_id();
+        cpu = safe_smp_processor_id();
         crash_save_this_cpu(regs, cpu);
 }
 
@@ -185,7 +186,7 @@ void machine_crash_shutdown(struct pt_regs *regs)
         local_irq_disable();
 
         /* Make a note of crashing cpu. Will be used in NMI callback.*/
-        crashing_cpu = smp_processor_id();
+        crashing_cpu = safe_smp_processor_id();
         nmi_shootdown_cpus();
         lapic_shutdown();
 #if defined(CONFIG_X86_IO_APIC)