1#ifndef __ASM_HARDIRQ_H 2#define __ASM_HARDIRQ_H 3 4/* only non-SMP supported */ 5 6#include <linux/threads.h> 7 8/* entry.S is sensitive to the offsets of these fields */ 9typedef struct { 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; 16 17#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */ 18 19/* 20 * Are we in an interrupt context? Either doing bottom half 21 * or hardware interrupt processing? 22 */ 23#define in_interrupt() ((local_irq_count(smp_processor_id()) + \ 24 local_bh_count(smp_processor_id())) != 0) 25#define in_irq() (local_irq_count(smp_processor_id()) != 0) 26 27#define hardirq_trylock(cpu) (local_irq_count(cpu) == 0) 28#define hardirq_endlock(cpu) do { (void)(cpu); } while (0) 29 30#define irq_enter(cpu) (local_irq_count(cpu)++) 31#define irq_exit(cpu) (local_irq_count(cpu)--) 32 33#define synchronize_irq() barrier() 34 35#endif /* __ASM_HARDIRQ_H */ 36