diff options
Diffstat (limited to 'arch/parisc/include/asm/hardirq.h')
| -rw-r--r-- | arch/parisc/include/asm/hardirq.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/hardirq.h b/arch/parisc/include/asm/hardirq.h new file mode 100644 index 000000000000..ce93133d5112 --- /dev/null +++ b/arch/parisc/include/asm/hardirq.h @@ -0,0 +1,29 @@ +/* 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 */ |