1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1997, 1998, 1999, 2000, 2001 by Ralf Baechle
7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8  * Copyright (C) 2001 MIPS Technologies, Inc.
9  */
10 #ifndef _ASM_SOFTIRQ_H
11 #define _ASM_SOFTIRQ_H
12 
13 #include <asm/atomic.h>
14 #include <asm/hardirq.h>
15 
cpu_bh_disable(int cpu)16 static inline void cpu_bh_disable(int cpu)
17 {
18 	local_bh_count(cpu)++;
19 	barrier();
20 }
21 
__cpu_bh_enable(int cpu)22 static inline void __cpu_bh_enable(int cpu)
23 {
24 	barrier();
25 	local_bh_count(cpu)--;
26 }
27 
28 #define local_bh_disable()	cpu_bh_disable(smp_processor_id())
29 #define __local_bh_enable()	__cpu_bh_enable(smp_processor_id())
30 #define local_bh_enable()					\
31 do {								\
32 	int cpu;						\
33 								\
34 	barrier();						\
35 	cpu = smp_processor_id();				\
36 	if (!--local_bh_count(cpu) && softirq_pending(cpu))	\
37 		do_softirq();					\
38 } while (0)
39 
40 #define in_softirq() (local_bh_count(smp_processor_id()) != 0)
41 
42 #endif /* _ASM_SOFTIRQ_H */
43