1 #ifndef __ASM_HARDIRQ_H
2 #define __ASM_HARDIRQ_H
4 #include <linux/config.h>
5 #include <linux/cache.h>
6 #include <linux/threads.h>
8 /* softirq.h is sensitive to the offsets of these fields */
10 unsigned int __softirq_pending;
11 unsigned int __local_irq_count;
12 unsigned int __local_bh_count;
13 unsigned int __syscall_count;
14 struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
15 } ____cacheline_aligned irq_cpustat_t;
17 #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
20 * Are we in an interrupt context? Either doing bottom half
21 * or hardware interrupt processing?
23 #define in_interrupt() ({ const int __cpu = smp_processor_id(); \
24 (local_irq_count(__cpu) + local_bh_count(__cpu) != 0); })
26 #define in_irq() (local_irq_count(smp_processor_id()) != 0)
30 #define hardirq_trylock(cpu) (local_irq_count(cpu) == 0)
31 #define hardirq_endlock(cpu) do { } while (0)
33 #define irq_enter(cpu,irq) (local_irq_count(cpu)++)
34 #define irq_exit(cpu,irq) (local_irq_count(cpu)--)
36 #define synchronize_irq() do { } while (0)
39 #error SMP not supported
40 #endif /* CONFIG_SMP */
42 #endif /* __ASM_HARDIRQ_H */