Re: [PATCH] lib/Kconfig: make PREEMPT_COUNT depend on PREEMPT in DEBUG_ATOMIC_SLEEP

On Fri, Feb 12, 2016 at 10:14:22AM -0800, Yang Shi wrote:

When building non-preempt kernel (PREEMPT_NONE), PREEMPT_COUNT is still enabled if DEBUG_ATOMIC_SLEEP is enabled. But, it sounds not make sense to have PREEMPT_COUNT set in non-preempt kernel.

So, make PREEMPT_COUNT depend on PREEMPT here.

Signed-off-by: Yang Shi yang.shi@linaro.org

lib/Kconfig.debug | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index ecb9e75..a5b6e11 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1075,7 +1075,7 @@ config DEBUG_LOCKDEP config DEBUG_ATOMIC_SLEEP bool "Sleep inside atomic section checking"

• select PREEMPT_COUNT

• select PREEMPT_COUNT if PREEMPT

OK, so do tell, how is it supposed to debug atomic sections without actually tracking atomic sections?