[PATCH v2 07/45] CPU hotplug: Expose the new debug config option

From: Srivatsa S. Bhat
Date: Tue Jun 25 2013 - 16:30:22 EST


Now that we have all the pieces of the CPU hotplug debug infrastructure
in place, expose the feature by growing a new Kconfig option,
CONFIG_DEBUG_HOTPLUG_CPU.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: "Paul E. McKenney" <paul.mckenney@xxxxxxxxxx>
Cc: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
---

lib/Kconfig.debug | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 566cf2b..ec6be74 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -512,6 +512,14 @@ config DEBUG_PREEMPT
if kernel code uses it in a preemption-unsafe way. Also, the kernel
will detect preemption count underflows.

+config DEBUG_HOTPLUG_CPU
+ bool "Debug CPU hotplug"
+ depends on HOTPLUG_CPU
+ help
+ If you say Y here, the kernel will check all the accesses of
+ cpu_online_mask from atomic contexts, and will print warnings if
+ the task lacks appropriate synchronization with CPU hotplug.
+
config DEBUG_RT_MUTEXES
bool "RT Mutex debugging, deadlock detection"
depends on DEBUG_KERNEL && RT_MUTEXES

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