AcoSail/kernel_optimize_test
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xtensa: replace setup_irq() by request_irq()

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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().

[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos

Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Message-Id: <20200304004112.3848-1-afzal.mohd.ma@gmail.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
afzal mohammed 2020-03-04 06:11:11 +05:30 committed by Max Filippov
parent 98d54f81e3
commit 98060484e2
2 changed files with 7 additions and 13 deletions
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8
arch/xtensa/kernel/smp.c
View File

@ -53,16 +53,12 @@ static void system_flush_invalidate_dcache_range(unsigned long start,
#define IPI_IRQ 0
static irqreturn_t ipi_interrupt(int irq, void *dev_id);
static struct irqaction ipi_irqaction = {
.handler = ipi_interrupt,
.flags = IRQF_PERCPU,
.name = "ipi",
};
void ipi_init(void)
{
unsigned irq = irq_create_mapping(NULL, IPI_IRQ);
setup_irq(irq, &ipi_irqaction);
if (request_irq(irq, ipi_interrupt, IRQF_PERCPU, "ipi", NULL))
pr_err("Failed to request irq %u (ipi)\n", irq);
}
static inline unsigned int get_core_count(void)

12
arch/xtensa/kernel/time.c
View File

@ -128,12 +128,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
.flags = IRQF_TIMER,
.name = "timer",
};
void local_timer_setup(unsigned cpu)
{
struct ccount_timer *timer = &per_cpu(ccount_timer, cpu);
@ -184,6 +178,8 @@ static inline void calibrate_ccount(void)
void __init time_init(void)
{
int irq;
of_clk_init(NULL);
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
pr_info("Calibrating CPU frequency ");
@ -199,7 +195,9 @@ void __init time_init(void)
__func__);
clocksource_register_hz(&ccount_clocksource, ccount_freq);
local_timer_setup(0);
setup_irq(this_cpu_ptr(&ccount_timer)->evt.irq, &timer_irqaction);
irq = this_cpu_ptr(&ccount_timer)->evt.irq;
if (request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL))
pr_err("Failed to request irq %d (timer)\n", irq);
sched_clock_register(ccount_sched_clock_read, 32, ccount_freq);
timer_probe();
}