Subject: [patch 15/15] powerpc: cpumask: Add DEBUG_PER_CPU_MAPS option

From: Anton Blanchard <[email-masked]>
Date: Tue, 27 Apr 2010 11:32:46 +1000

Enable the DEBUG_PER_CPU_MAPS option so we can look for problems with
cpumasks .

Signed-off-by: Anton Blanchard <[email-masked]>
---

Index: linux-cpumask/arch/powerpc/Kconfig.debug
===================================================================
--- linux-cpumask.orig/arch/powerpc/Kconfig.debug	2010-04-22 14:51:36.359196562 +1000
+++ linux-cpumask/arch/powerpc/Kconfig.debug	2010-04-22 14:52:04.845445439 +1000
@@ -44,6 +44,18 @@ config DEBUG_STACK_USAGE
 
 	  This option will slow down process creation somewhat.
 
+config DEBUG_PER_CPU_MAPS
+	bool "Debug access to per_cpu maps"
+	depends on DEBUG_KERNEL
+	depends on SMP
+	default n
+	---help---
+	  Say Y to verify that the per_cpu map being accessed has
+	  been setup.  Adds a fair amount of code to kernel memory
+	  and decreases performance.
+
+	  Say N if unsure.
+
 config HCALL_STATS
 	bool "Hypervisor call instrumentation"
 	depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS