Re: [PATCH v1 2/2] x86: kconfig: remove X86_UP_APIC

["Jan Beulich" <JBeulich@suse.com>]

>>> On 12.03.15 at 00:10, <mcgrof@do-not-panic.com> wrote:
>  config X86_LOCAL_APIC
>  	def_bool y
> -	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI
> +	depends on X86_64 || SMP || X86_32_NON_STANDARD || PCI_MSI

I.e. building a 32-bit kernel with APIC support but with !SMP, !PCI_MSI,
and !X86_32_NON_STANDARD will now be impossible. Surely not
what the patch description says.

> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -5,6 +5,8 @@ config PCI_MSI
>  	bool "Message Signaled Interrupts (MSI and MSI-X)"
>  	depends on PCI
>  	select GENERIC_MSI_IRQ
> +	select X86_LOCAL_APIC
> +	select X86_IO_APIC

I don't see the need for the latter - MSI specifically works without
any IO-APIC interaction. And for the former you should decide
which way you want it - PCI_MSI select X86_LOCAL_APIC
(probably the right thing in x86, but surely wrong everwhere
else, i.e. this at least needs a condition tagged onto it) or
X86_LOCAL_APIC depend on PCI_MSI; in no case should this
be a forward _and_ reverse dependency.

Jan