Hi Arnd,

On Thu, Sep 12, 2019 at 2:59 PM Arnd Bergmann [off-list ref] wrote:

On Thu, Sep 12, 2019 at 12:18 AM Amit Kucheria [off-list ref] wrote:

quoted

I was using initcall_debugging on a QCOM platform and ran across a bunch of
driver initcalls that are enabled even if their SoC support is disabled.

Here are some fixups for a subset of them.

The idea seems reasonable, disabling a platform may just turn off
all the drivers that are not useful elsewhere, but there are mistakes
in a lot of your changes, so I'm certainly not applying these for 5.4.

OK, thanks for confirming that you have no objections to such changes, per-se.

I'll spend some more time ensuring COMPILE_TEST coverage for these
cleanups. I only focused on quickly cleaning up my initcall_debug
output for now.

Generally speaking, the way that works best is

config SUBSYS_DRIVER_FOO
       tristate "SUBSYS support for FOO platform"
       depends on ARCH_FOO || COMPILE_TEST
       depends on SUBSYS
       default "m" if ARCH_FOO

This means it's enabled as a loadable module by default (use
default "y" instead where necessary) as long as the platform
is enabled, but an x86 allmodconfig build also includes it
because of COMPILE_TEST, while any configuration without
ARCH_FOO that is not compile-testing cannot enable it.

How would you like to handle defconfigs which list a driver
explicitly? Should we add ARCH_FOO to those defconfigs or remove
DRIVER_FOO from them?

Regards,
Amit

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