From: Fernando Vazquez <fernando@intellilink.co.jp>
Date: Sun, 1 Oct 2006 06:29:09 +0000 (-0700)
Subject: [PATCH] stack overflow safe kdump: crash: use safe_smp_processor_id()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ce53af9496c625a8ae33526713be34a23756db19;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[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>
---

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)