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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-29 18:09:57 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-31 19:23:09 +0200 |
| commit | bc07844a33734c4b2f32ef26d942d2f3ef9302ea (patch) | |
| tree | ae8cbb6dc9a17baca82a829e77c5b7fc5781b2a5 /arch/x86/include | |
| parent | x86: Add Moorestown early detection (diff) | |
| download | linux-bc07844a33734c4b2f32ef26d942d2f3ef9302ea.tar.xz linux-bc07844a33734c4b2f32ef26d942d2f3ef9302ea.zip | |
x86: Distangle ioapic and i8259
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>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/io_apic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h index 2b8aeb89933a..e1f89a1a07ef 100644 --- a/arch/x86/include/asm/io_apic.h +++ b/arch/x86/include/asm/io_apic.h @@ -143,6 +143,8 @@ extern int noioapicreroute; /* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */ extern int timer_through_8259; +extern void io_apic_disable_legacy(void); + /* * If we use the IO-APIC for IRQ routing, disable automatic * assignment of PCI IRQ's. |