/* hardirq.h: PA-RISC hard IRQ support. * * Copyright (C) 2001 Matthew Wilcox * * 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 #include typedef struct { unsigned long __softirq_pending; /* set_bit is used on this */ } ____cacheline_aligned irq_cpustat_t; #include /* Standard mappings for irq_cpustat_t above */ void ack_bad_irq(unsigned int irq); #endif /* _PARISC_HARDIRQ_H */
