Re: [PATCH] Centralise CONFIG_ARCH_NO_VIRT_TO_BUS

Bjorn Helgaas
2012-11-14T14:53:56Z

On Tue, Nov 13, 2012 at 3:32 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> On Mon, Nov 12, 2012 at 10:26 PM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>> diff --git a/arch/Kconfig b/arch/Kconfig
>> index 366ec06..9bc00e7 100644
>> --- a/arch/Kconfig
>> +++ b/arch/Kconfig
>> @@ -271,6 +271,13 @@ config ARCH_WANT_OLD_COMPAT_IPC
>> select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
>> bool
>>
>> +config ARCH_NO_VIRT_TO_BUS
>> + bool
>> + help
>> + An architecture should select this if it cannot (or will not)
>> + implement virt_to_bus(). All new architectures should probably
>> + select this.
>
> Don't we typically put the burden of selecting Kconfig flags for deprecated
> features on the existing architectures that provide the deprecated features?
>
> I.e. shouldn't it be ARCH_HAS_VIRT_TO_BUS, selected by the architectures
> that need it, instead?

I like this idea.