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SubjectRe: [PATCH] 'noapic' already handled elsewhere
Brown, Len wrote:
> Jeff,
> This won't work.
> acpi_boot_init() is called from setup_arch(), which is called from
> start_kernel() _before_ parse_options(). Ie. ACPI needs to consume this
> flag before __setup() is invoked.

Thanks for the correction. I'll resend the earlier
s/LOCAL_APIC/IO_APIC/ patch then.

Just found another ACPI bug in 2.6:

> config ACPI_HT
> bool "ACPI Processor Enumeration for HT"
> depends on (X86 && X86_LOCAL_APIC)
> default y
> config ACPI
> bool "Full ACPI Support"
> depends on !X86_VISWS
> depends on !IA64_HP_SIM
> depends on IA64 || (X86 && ACPI_HT)

So CONFIG_ACPI is not allowed on uniprocessor anymore, _and_ it requires
HyperThreading code? ;-) No wonder CONFIG_ACPI didn't appear for my
uniprocessor Pentium3 'make oldconfig' ;-)

(ACPI requires ACPI_HT, which requires LOCAL_APIC)

Another reason why I was saying that CONFIG_ACPI should be the toplevel
config option (even if CONFIG_ACPI never actually appears in any code,
but only in Kconfig)...


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