30 строки
1003 B
C
30 строки
1003 B
C
/* hardirq.h: PA-RISC hard IRQ support.
|
|
*
|
|
* Copyright (C) 2001 Matthew Wilcox <matthew@wil.cx>
|
|
*
|
|
* The locking is really quite interesting. There's a cpu-local
|
|
* count of how many interrupts are being handled, and a global
|
|
* lock. An interrupt can only be serviced if the global lock
|
|
* is free. You can't be sure no more interrupts are being
|
|
* serviced until you've acquired the lock and then checked
|
|
* all the per-cpu interrupt counts are all zero. It's a specialised
|
|
* br_lock, and that's exactly how Sparc does it. We don't because
|
|
* it's more locking for us. This way is lock-free in the interrupt path.
|
|
*/
|
|
|
|
#ifndef _PARISC_HARDIRQ_H
|
|
#define _PARISC_HARDIRQ_H
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/irq.h>
|
|
|
|
typedef struct {
|
|
unsigned long __softirq_pending; /* set_bit is used on this */
|
|
} ____cacheline_aligned irq_cpustat_t;
|
|
|
|
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
|
|
|
|
void ack_bad_irq(unsigned int irq);
|
|
|
|
#endif /* _PARISC_HARDIRQ_H */
|