2 * include/linux/irqflags.h
4 * IRQ flags tracing: follow the state of the hardirq and softirq flags and
5 * provide callbacks for transitions between ON and OFF states.
7 * This file gets included from lowlevel asm headers too, to provide
8 * wrapped versions of the local_irq_*() APIs, based on the
9 * raw_local_irq_*() macros from the lowlevel headers.
11 #ifndef _LINUX_TRACE_IRQFLAGS_H
12 #define _LINUX_TRACE_IRQFLAGS_H
14 #include <linux/typecheck.h>
16 #ifdef CONFIG_TRACE_IRQFLAGS
17 extern void trace_softirqs_on(unsigned long ip);
18 extern void trace_softirqs_off(unsigned long ip);
19 extern void trace_hardirqs_on(void);
20 extern void trace_hardirqs_off(void);
21 # define trace_hardirq_context(p) ((p)->hardirq_context)
22 # define trace_softirq_context(p) ((p)->softirq_context)
23 # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled)
24 # define trace_softirqs_enabled(p) ((p)->softirqs_enabled)
25 # define trace_hardirq_enter() do { current->hardirq_context++; } while (0)
26 # define trace_hardirq_exit() do { current->hardirq_context--; } while (0)
27 # define trace_softirq_enter() do { current->softirq_context++; } while (0)
28 # define trace_softirq_exit() do { current->softirq_context--; } while (0)
29 # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1,
31 # define trace_hardirqs_on() do { } while (0)
32 # define trace_hardirqs_off() do { } while (0)
33 # define trace_softirqs_on(ip) do { } while (0)
34 # define trace_softirqs_off(ip) do { } while (0)
35 # define trace_hardirq_context(p) 0
36 # define trace_softirq_context(p) 0
37 # define trace_hardirqs_enabled(p) 0
38 # define trace_softirqs_enabled(p) 0
39 # define trace_hardirq_enter() do { } while (0)
40 # define trace_hardirq_exit() do { } while (0)
41 # define trace_softirq_enter() do { } while (0)
42 # define trace_softirq_exit() do { } while (0)
43 # define INIT_TRACE_IRQFLAGS
46 #if defined(CONFIG_IRQSOFF_TRACER) || \
47 defined(CONFIG_PREEMPT_TRACER)
48 extern void stop_critical_timings(void);
49 extern void start_critical_timings(void);
51 # define stop_critical_timings() do { } while (0)
52 # define start_critical_timings() do { } while (0)
55 #include <asm/irqflags.h>
57 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
59 #define local_irq_enable() \
60 do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
61 #define local_irq_disable() \
62 do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
63 #define local_irq_save(flags) \
65 typecheck(unsigned long, flags); \
66 raw_local_irq_save(flags); \
67 trace_hardirqs_off(); \
71 #define local_irq_restore(flags) \
73 typecheck(unsigned long, flags); \
74 if (raw_irqs_disabled_flags(flags)) { \
75 raw_local_irq_restore(flags); \
76 trace_hardirqs_off(); \
78 trace_hardirqs_on(); \
79 raw_local_irq_restore(flags); \
82 #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
84 * The local_irq_*() APIs are equal to the raw_local_irq*()
87 #define local_irq_disable() raw_local_irq_disable()
88 #define local_irq_enable() raw_local_irq_enable()
89 #define local_irq_save(flags) \
91 typecheck(unsigned long, flags); \
92 raw_local_irq_save(flags); \
94 # define local_irq_restore(flags) \
96 typecheck(unsigned long, flags); \
97 raw_local_irq_restore(flags); \
99 #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
101 #define safe_halt() \
103 trace_hardirqs_on(); \
107 #define local_save_flags(flags) \
109 typecheck(unsigned long, flags); \
110 raw_local_save_flags(flags); \
113 #define irqs_disabled() \
115 unsigned long _flags; \
117 raw_local_save_flags(_flags); \
118 raw_irqs_disabled_flags(_flags); \
121 #define irqs_disabled_flags(flags) \
123 typecheck(unsigned long, flags); \
124 raw_irqs_disabled_flags(flags); \