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ARM: Kill __smp_cross_call and co

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The old IPI registration interface is now unused on arm, so let's
get rid of it.

Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2020-06-22 22:15:54 +01:00
parent a263881525
commit 8aa837cb7a
2 changed files with 7 additions and 25 deletions
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6
arch/arm/include/asm/smp.h
View file

@ -39,12 +39,6 @@ void handle_IPI(int ipinr, struct pt_regs *regs);
*/
extern void smp_init_cpus(void);
/*
* Provide a function to raise an IPI cross call on CPUs in callmap.
*/
extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
/*
* Register IPI interrupts with the arch SMP code
*/

26
arch/arm/kernel/smp.c
View file

@ -511,14 +511,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
}
}
static void (*__smp_cross_call)(const struct cpumask *, unsigned int);
void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
{
if (!__smp_cross_call)
__smp_cross_call = fn;
}
static const char *ipi_types[NR_IPI] __tracepoint_string = {
#define S(x,s) [x] = s
S(IPI_WAKEUP, "CPU wakeup interrupts"),
@ -530,11 +522,7 @@ static const char *ipi_types[NR_IPI] __tracepoint_string = {
S(IPI_COMPLETION, "completion interrupts"),
};
static void smp_cross_call(const struct cpumask *target, unsigned int ipinr)
{
trace_ipi_raise_rcuidle(target, ipi_types[ipinr]);
__smp_cross_call(target, ipinr);
}
static void smp_cross_call(const struct cpumask *target, unsigned int ipinr);
void show_ipi_list(struct seq_file *p, int prec)
{
@ -713,16 +701,17 @@ static irqreturn_t ipi_handler(int irq, void *data)
return IRQ_HANDLED;
}
static void ipi_send(const struct cpumask *target, unsigned int ipi)
static void smp_cross_call(const struct cpumask *target, unsigned int ipinr)
{
__ipi_send_mask(ipi_desc[ipi], target);
trace_ipi_raise_rcuidle(target, ipi_types[ipinr]);
__ipi_send_mask(ipi_desc[ipinr], target);
}
static void ipi_setup(int cpu)
{
int i;
if (!ipi_irq_base)
if (WARN_ON_ONCE(!ipi_irq_base))
return;
for (i = 0; i < nr_ipi; i++)
@ -733,7 +722,7 @@ static void ipi_teardown(int cpu)
{
int i;
if (!ipi_irq_base)
if (WARN_ON_ONCE(!ipi_irq_base))
return;
for (i = 0; i < nr_ipi; i++)
@ -759,7 +748,6 @@ void __init set_smp_ipi_range(int ipi_base, int n)
}
ipi_irq_base = ipi_base;
set_smp_cross_call(ipi_send);
/* Setup the boot CPU immediately */
ipi_setup(smp_processor_id());
@ -872,7 +860,7 @@ core_initcall(register_cpufreq_notifier);
static void raise_nmi(cpumask_t *mask)
{
__smp_cross_call(mask, IPI_CPU_BACKTRACE);
__ipi_send_mask(ipi_desc[IPI_CPU_BACKTRACE], mask);
}
void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)