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x86: wrap MCA_bus test around an ifdef 

Only test for MCA_bus if support for MCA is compiled in.
Also, for x86_64, write the code inside the conditional
for consistency with i386. It won't bite us, since it'll
probably never select CONFIG_MCA anyway.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa 2008-07-21 18:42:52 -03:00 committed by Ingo Molnar
parent 2c460d0b68
commit 33c053d0ae
2 changed files with 10 additions and 0 deletions
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2
arch/x86/kernel/time_32.c
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@ -94,6 +94,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
do_timer_interrupt_hook();
#ifdef CONFIG_MCA
if (MCA_bus) {
/* The PS/2 uses level-triggered interrupts. You can't
turn them off, nor would you want to (any attempt to
@ -107,6 +108,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
u8 irq_v = inb_p( 0x61 ); /* read the current state */
outb_p( irq_v|0x80, 0x61 ); /* reset the IRQ */
}
#endif
return IRQ_HANDLED;
}

8
arch/x86/kernel/time_64.c
View File

@ -16,6 +16,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/mca.h>
#include <asm/i8253.h>
#include <asm/hpet.h>
@ -54,6 +55,13 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
global_clock_event->event_handler(global_clock_event);
#ifdef CONFIG_MCA
if (MCA_bus) {
u8 irq_v = inb_p(0x61); /* read the current state */
outb_p(irq_v|0x80, 0x61); /* reset the IRQ */
}
#endif
return IRQ_HANDLED;
}