On 5/18/22 13:47, Heiko Carstens wrote:
On Tue, May 10, 2022 at 02:47:23PM +0000, Steffen Eiden wrote:
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig
index 6cc4b19acf85..e9b9902abbaf 100644
--- a/drivers/s390/char/Kconfig
+++ b/drivers/s390/char/Kconfig
@@ -100,6 +100,16 @@ config SCLP_OFB
This option enables the Open-for-Business interface to the s390
Service Element.
+config S390_UV_UAPI
+ def_tristate y
+ prompt "Ultravisor userspace API"
+ help
+ Selecting exposes parts of the UV interface to userspace
+ by providing a misc character device at /dev/uv.
+ Using IOCTLs one can interact with the UV.
+ The device is only available if the Ultravisor
+ Facility (158) is present.
Is there a reason why this is default "y"? If you think this should be
compiled into the kernel if used, then why allow to make it a module
at all?
Instead you could get rid of a couple if lines of code.
There was a lot of discussion around this already and the "Y" was chosen
as auto-loading this is a pain and therefore the SCLP and CHSC-Misc set
it to Y and we took that as an example (Steffen spoke to Peter to get
guidance).
I'm sure that we want the possibility to have this as a module.
Personally I'd choose "m" over "y" since the module is only useful for a
very small amount of users.
