mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 17:16:41 +07:00
ac8fd122e0
request_irq() is preferred over setup_irq(). Invocations of setup_irq() occur after memory allocators are ready. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). remove_irq() has been replaced by free_irq() as well. There were build error's during previous version, couple of which was reported by kbuild test robot <lkp@intel.com> of which one was reported by Thomas Bogendoerfer <tsbogend@alpha.franken.de> as well. There were a few more issues including build errors, those also have been fixed. [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
39 lines
839 B
C
39 lines
839 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
void __init setup_pit_timer(void)
|
|
{
|
|
unsigned long flags = IRQF_NOBALANCING | IRQF_TIMER;
|
|
|
|
clockevent_i8253_init(true);
|
|
if (request_irq(0, timer_interrupt, flags, "timer", NULL))
|
|
pr_err("Failed to request irq 0 (timer)\n");
|
|
}
|
|
|
|
static int __init init_pit_clocksource(void)
|
|
{
|
|
if (num_possible_cpus() > 1 || /* PIT does not scale! */
|
|
!clockevent_state_periodic(&i8253_clockevent))
|
|
return 0;
|
|
|
|
return clocksource_i8253_init();
|
|
}
|
|
arch_initcall(init_pit_clocksource);
|