blob: c96c7a390692b5acf49815f53fc55f0bde26b2c6 [file] [log] [blame]
#ifndef __ASM_HARDIRQ_H
#define __ASM_HARDIRQ_H
#include <linux/config.h>
#include <linux/cache.h>
#include <linux/threads.h>
/* softirq.h is sensitive to the offsets of these fields */
typedef struct {
unsigned int __softirq_pending;
unsigned int __local_irq_count;
unsigned int __local_bh_count;
unsigned int __syscall_count;
struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
} ____cacheline_aligned irq_cpustat_t;
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
/*
* Are we in an interrupt context? Either doing bottom half
* or hardware interrupt processing?
*/
#define in_interrupt() ({ const int __cpu = smp_processor_id(); \
(local_irq_count(__cpu) + local_bh_count(__cpu) != 0); })
#define in_irq() (local_irq_count(smp_processor_id()) != 0)
#ifndef CONFIG_SMP
#define hardirq_trylock(cpu) (local_irq_count(cpu) == 0)
#define hardirq_endlock(cpu) do { } while (0)
#define irq_enter(cpu,irq) (local_irq_count(cpu)++)
#define irq_exit(cpu,irq) (local_irq_count(cpu)--)
#define synchronize_irq() do { } while (0)
#define release_irqlock(cpu) do { } while (0)
#else
#error SMP not supported
#endif /* CONFIG_SMP */
#endif /* __ASM_HARDIRQ_H */