mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 19:01:37 +00:00
8b5690f884
Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled], We run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled (see commit [b738a50a: genirq: Warn when handler enables interrupts]). So now this flag is a NOOP and can be removed. [ralf@linux-mips.org: Fixed up conflicts in arch/mips/alchemy/common/dbdma.c, arch/mips/cavium-octeon/smp.c and arch/mips/kernel/perf_event.c.] Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> To: linux-kernel@vger.kernel.org Cc: tglx@linutronix.de linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2835/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
40 lines
734 B
C
40 lines
734 B
C
/*
|
|
* i8253.c 8253/PIT functions
|
|
*
|
|
*/
|
|
#include <linux/clockchips.h>
|
|
#include <linux/i8253.h>
|
|
#include <linux/export.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include <asm/time.h>
|
|
|
|
static irqreturn_t timer_interrupt(int irq, void *dev_id)
|
|
{
|
|
i8253_clockevent.event_handler(&i8253_clockevent);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction irq0 = {
|
|
.handler = timer_interrupt,
|
|
.flags = IRQF_NOBALANCING | IRQF_TIMER,
|
|
.name = "timer"
|
|
};
|
|
|
|
void __init setup_pit_timer(void)
|
|
{
|
|
clockevent_i8253_init(true);
|
|
setup_irq(0, &irq0);
|
|
}
|
|
|
|
static int __init init_pit_clocksource(void)
|
|
{
|
|
if (num_possible_cpus() > 1) /* PIT does not scale! */
|
|
return 0;
|
|
|
|
return clocksource_i8253_init();
|
|
}
|
|
arch_initcall(init_pit_clocksource);
|