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1da177e4 LT |
1 | #ifndef __ASM_HARDIRQ_H |
2 | #define __ASM_HARDIRQ_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | #include <linux/cache.h> | |
6 | #include <linux/threads.h> | |
7 | ||
8 | typedef struct { | |
9 | unsigned int __softirq_pending; | |
10 | } ____cacheline_aligned irq_cpustat_t; | |
11 | ||
12 | #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */ | |
13 | ||
14 | #define HARDIRQ_BITS 8 | |
15 | ||
16 | /* | |
17 | * The hardirq mask has to be large enough to have space | |
18 | * for potentially all IRQ sources in the system nesting | |
19 | * on a single CPU: | |
20 | */ | |
21 | #if (1 << HARDIRQ_BITS) < NR_IRQS | |
22 | # error HARDIRQ_BITS is too low! | |
23 | #endif | |
24 | ||
1da177e4 LT |
25 | #ifndef CONFIG_SMP |
26 | ||
27 | extern asmlinkage void __do_softirq(void); | |
28 | ||
29 | #define irq_exit() \ | |
30 | do { \ | |
31 | preempt_count() -= IRQ_EXIT_OFFSET; \ | |
32 | if (!in_interrupt() && local_softirq_pending()) \ | |
33 | __do_softirq(); \ | |
34 | preempt_enable_no_resched(); \ | |
35 | } while (0) | |
36 | #endif | |
37 | ||
38 | ||
39 | #endif /* __ASM_HARDIRQ_H */ |