linux-kernel - [PATCH 148/173] powerpc: Fix default_machine_crash

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Date:	Mon, 25 Apr 2011 22:05:00 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, Greg KH <greg@...ah.com>
Cc:	Ben Hutchings <ben@...adent.org.uk>,
	Debian kernel maintainers <debian-kernel@...ts.debian.org>,
	debian-release@...ts.debian.org,
	"Adam D. Barratt" <adam@...m-barratt.org.uk>,
	paulmck@...ux.vnet.ibm.com, mikey@...ling.org,
	benh@...nel.crashing.org, anton@...ba.org,
	dann frazier <dannf@...nf.org>, galak@...nel.crashing.org,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 148/173] powerpc: Fix default_machine_crash_shutdown #ifdef botch

2.6.27.59-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>

powerpc: Fix default_machine_crash_shutdown #ifdef botch

Commit: c2be05481f6125254c45b78f334d4dd09c701c82 upstream

crash_kexec_wait_realmode() is defined only if CONFIG_PPC_STD_MMU_64
and CONFIG_SMP, but is called if CONFIG_PPC_STD_MMU_64 even if !CONFIG_SMP.
Fix the conditional compilation around the invocation.

Reported-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@...ling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
cc: Anton Blanchard <anton@...ba.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/powerpc/kernel/crash.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -447,7 +447,7 @@ void default_machine_crash_shutdown(stru
 	crash_kexec_prepare_cpus(crashing_cpu);
 	cpu_set(crashing_cpu, cpus_in_crash);
 	crash_kexec_stop_spus();
-#ifdef CONFIG_PPC_STD_MMU_64
+#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
 	crash_kexec_wait_realmode(crashing_cpu);
 #endif
 	if (ppc_md.kexec_cpu_down)


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