linux-kernel - [PATCH] powerpc: Define cpus_in

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Date:	Wed, 1 Feb 2012 10:55:10 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, anton@...ba.org,
	paul.gortmaker@...driver.com, ben@...adent.org.uk,
	mikey@...ling.org
Subject: [PATCH] powerpc: Define cpus_in_crash only for SMP kernels

The variable cpus_in_crash gets a defined-but-not-used warning when
CONFIG_SMP=n, so fix by placing the variable under ifdef.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 28be345..eb3384e 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -46,7 +46,9 @@
 
 /* This keeps a track of which one is the crashing cpu. */
 int crashing_cpu = -1;
+#ifdef CONFIG_SMP
 static atomic_t cpus_in_crash;
+#endif /* #ifdef CONFIG_SMP */
 static int time_to_dump;
 
 #define CRASH_HANDLER_MAX 3

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