From: Anton Blanchard <anton@samba.org>
Date: Mon, 26 Apr 2010 15:32:46 +0000 (+0000)
Subject: powerpc/cpumask: Add DEBUG_PER_CPU_MAPS option
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ceba1abcb00b0ef0b1efcd715285f6e05523edef;p=linux-beck.git

powerpc/cpumask: Add DEBUG_PER_CPU_MAPS option

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

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 5cdd7ed9a12e..53696da4518f 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -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