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| author | Glauber Costa <gcosta@redhat.com> | 2008-07-21 18:42:52 -0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-13 10:21:47 +0200 |
| commit | 33c053d0aec344c8b2ad6966d904ebeff64e590b (patch) | |
| tree | 4c5688f392c8a762c83a55be8e9401432e28eab1 /arch/x86/kernel/time_64.c | |
| parent | 2c460d0b6813a5d2a7d571b0b561e4e727036dd7 (diff) | |
| download | blackbird-op-linux-33c053d0aec344c8b2ad6966d904ebeff64e590b.tar.gz blackbird-op-linux-33c053d0aec344c8b2ad6966d904ebeff64e590b.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/time_64.c')
| -rw-r--r-- | arch/x86/kernel/time_64.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index 2be67c24909e..207a7a1d7ac5 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -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; } |
