Re: include architecture Kconfig files from top-level Kconfig v3

[Christoph Hellwig]

On Wed, Jul 25, 2018 at 01:30:24PM +0900, Masahiro Yamada wrote:
> Could you check the difference of CONFIG_PREEMPT_COUNT, please?
> 
> 
> For alpha, hexagon, um,
> CONFIG_PREEMPT_COUNT was previously never enabled
> because kernel/Kconfig.preempt was not included.
> 
> Now, CONFIG_PREEMPT_COUNT can be enabled
> if it is select'ed by someone.
> 
> I guess this change will be OK, but
> I'd like you and Randy to double-check it just in case.

It might be fine, but with this little fix folded in we should be
safer:

diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
index cd1655122ec0..1321a4a7a677 100644
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -57,4 +57,5 @@ config PREEMPT
 endchoice
 
 config PREEMPT_COUNT
-       bool
\ No newline at end of file
+	depends on !ARCH_NO_PREEMPT
+	bool