1 /*
2  *  include/asm-s390/softirq.h
3  *
4  *  S390 version
5  *
6  *  Derived from "include/asm-i386/softirq.h"
7  */
8 
9 #ifndef __ASM_SOFTIRQ_H
10 #define __ASM_SOFTIRQ_H
11 
12 #ifndef __LINUX_SMP_H
13 #include <linux/smp.h>
14 #endif
15 
16 #include <asm/atomic.h>
17 #include <asm/hardirq.h>
18 #include <asm/lowcore.h>
19 
20 #define __cpu_bh_enable(cpu) \
21                 do { barrier(); local_bh_count(cpu)--; } while (0)
22 #define cpu_bh_disable(cpu) \
23                 do { local_bh_count(cpu)++; barrier(); } while (0)
24 
25 #define local_bh_disable()      cpu_bh_disable(smp_processor_id())
26 #define __local_bh_enable()     __cpu_bh_enable(smp_processor_id())
27 
28 #define in_softirq() (local_bh_count(smp_processor_id()) != 0)
29 
30 extern void do_call_softirq(void);
31 
32 #define local_bh_enable()			          	        \
33 do {							                \
34         unsigned int *ptr = &local_bh_count(smp_processor_id());        \
35         barrier();                                                      \
36         if (!--*ptr)							\
37 		if (softirq_pending(smp_processor_id()))		\
38 			/* Use the async. stack for softirq */		\
39 			do_call_softirq();				\
40 } while (0)
41 
42 #endif	/* __ASM_SOFTIRQ_H */
43 
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50