diff options
| author | Bitao Hu <yaoma@linux.alibaba.com> | 2024-04-11 15:41:30 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-04-12 17:08:05 +0200 |
| commit | 86d2a2f51fbada84e377665df06b5a479a1edc99 (patch) | |
| tree | 4d4841bbc3a1d129a8cc9d6793bb19fb52553720 /include/linux | |
| parent | 81e4cb0fd45c84d416e3edffbf6ae62c89ce6b5a (diff) | |
genirq: Convert kstat_irqs to a struct
The irq_desc::kstat_irqs member is a per-CPU variable of type int, which is
only capable of counting. A snapshot mechanism for interrupt statistics
will be added soon, which requires an additional variable to store the
snapshot.
To facilitate expansion, convert kstat_irqs here to a struct containing
only the count.
Originally-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Bitao Hu <yaoma@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240411074134.30922-2-yaoma@linux.alibaba.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/irqdesc.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index d9451d456a73..c28612674acb 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -18,6 +18,14 @@ struct irq_domain; struct pt_regs; /** + * struct irqstat - interrupt statistics + * @cnt: real-time interrupt count + */ +struct irqstat { + unsigned int cnt; +}; + +/** * struct irq_desc - interrupt descriptor * @irq_common_data: per irq and chip data passed down to chip functions * @kstat_irqs: irq stats per cpu @@ -55,7 +63,7 @@ struct pt_regs; struct irq_desc { struct irq_common_data irq_common_data; struct irq_data irq_data; - unsigned int __percpu *kstat_irqs; + struct irqstat __percpu *kstat_irqs; irq_flow_handler_t handle_irq; struct irqaction *action; /* IRQ action list */ unsigned int status_use_accessors; @@ -119,7 +127,7 @@ extern struct irq_desc irq_desc[NR_IRQS]; 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; + return desc->kstat_irqs ? per_cpu(desc->kstat_irqs->cnt, cpu) : 0; } static inline struct irq_desc *irq_data_to_desc(struct irq_data *data) |