x86: Distangle ioapic and i8259

Browse source

The proposed Moorestown support patches use an extra feature flag
mechanism to make the ioapic work w/o an i8259. There is a much
simpler solution.

Most i8259 specific functions are already called dependend on the irq
number less than NR_IRQS_LEGACY. Replacing that constant by a
read_mostly variable which can be set to 0 by the platform setup code
allows us to achieve the same without any special feature flags.

That trivial change allows us to proceed with MRST w/o doing a full
blown overhaul of the ioapic code which would delay MRST unduly.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

This commit is contained in:

Thomas Gleixner 2009-08-29 18:09:57 +02:00

parent 3f4110a48a

commit bc07844a33

2 changed files with 31 additions and 12 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/x86/include/asm/io_apic.h

View file

41

arch/x86/kernel/apic/io_apic.c

View file