Commit 501e2db6 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Provide kstat_irqdesc_cpu() 



Most users of kstat_irqs_cpu() have the irq descriptor already. No point in
calling into the core code and looking it up once more.

Use it in per_cpu_count_show() to start with.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201210194043.362094758@linutronix.de
parent 26c19d0a

include/linux/irqdesc.h

+6 −0
Original line number Diff line number Diff line
@@ -113,6 +113,12 @@ static inline void irq_unlock_sparse(void) { } 
extern struct irq_desc irq_desc[NR_IRQS];

#endif



static inline unsigned int irq_desc_kstat_cpu(struct irq_desc *desc,

					      unsigned int cpu)

{

	return desc->kstat_irqs ? *per_cpu_ptr(desc->kstat_irqs, cpu) : 0;

}



static inline struct irq_desc *irq_data_to_desc(struct irq_data *data)

{

	return container_of(data->common, struct irq_desc, irq_common_data);

kernel/irq/irqdesc.c

+2 −2
Original line number Diff line number Diff line
@@ -147,12 +147,12 @@ static ssize_t per_cpu_count_show(struct kobject *kobj, 
				  struct kobj_attribute *attr, char *buf)

{

	struct irq_desc *desc = container_of(kobj, struct irq_desc, kobj);

	int cpu, irq = desc->irq_data.irq;

	ssize_t ret = 0;

	char *p = "";

	int cpu;



	for_each_possible_cpu(cpu) {

		unsigned int c = kstat_irqs_cpu(irq, cpu);

		unsigned int c = irq_desc_kstat_cpu(desc, cpu);



		ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%u", p, c);

		p = ",";

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