| /* 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 */ |