1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_BH_H
3 #define _LINUX_BH_H
4
5 #include <linux/instruction_pointer.h>
6 #include <linux/preempt.h>
7
8 #if defined(CONFIG_PREEMPT_RT) || defined(CONFIG_TRACE_IRQFLAGS)
9 extern void __local_bh_disable_ip(unsigned long ip, unsigned int cnt);
10 #else
11 static __always_inline void __local_bh_disable_ip(unsigned long ip, unsigned int cnt)
12 {
13 preempt_count_add(cnt);
14 barrier();
15 }
16 #endif
17
18 static inline void local_bh_disable(void)
19 {
20 __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET);
21 }
22
23 extern void _local_bh_enable(void);
24 extern void __local_bh_enable_ip(unsigned long ip, unsigned int cnt);
25
26 static inline void local_bh_enable_ip(unsigned long ip)
27 {
28 __local_bh_enable_ip(ip, SOFTIRQ_DISABLE_OFFSET);
29 }
30
31 static inline void local_bh_enable(void)
32 {
33 __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET);
34 }
35
36 #ifdef CONFIG_PREEMPT_RT
37 extern bool local_bh_blocked(void);
38 #else
39 static inline bool local_bh_blocked(void) { return false; }
40 #endif
41
42 #endif /* _LINUX_BH_H */
43
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