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 #ifdef CONFIG_TRACE_IRQFLAGS
15 extern void trace_softirqs_on(unsigned long ip);
16 extern void trace_softirqs_off(unsigned long ip);
17 extern void trace_hardirqs_on(void);
18 extern void trace_hardirqs_off(void);
19 # define trace_hardirq_context(p) ((p)->hardirq_context)
20 # define trace_softirq_context(p) ((p)->softirq_context)
21 # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled)
22 # define trace_softirqs_enabled(p) ((p)->softirqs_enabled)
23 # define trace_hardirq_enter() do { current->hardirq_context++; } while (0)
24 # define trace_hardirq_exit() do { current->hardirq_context--; } while (0)
25 # define trace_softirq_enter() do { current->softirq_context++; } while (0)
26 # define trace_softirq_exit() do { current->softirq_context--; } while (0)
27 # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1,
29 # define trace_hardirqs_on() do { } while (0)
30 # define trace_hardirqs_off() do { } while (0)
31 # define trace_softirqs_on(ip) do { } while (0)
32 # define trace_softirqs_off(ip) do { } while (0)
33 # define trace_hardirq_context(p) 0
34 # define trace_softirq_context(p) 0
35 # define trace_hardirqs_enabled(p) 0
36 # define trace_softirqs_enabled(p) 0
37 # define trace_hardirq_enter() do { } while (0)
38 # define trace_hardirq_exit() do { } while (0)
39 # define trace_softirq_enter() do { } while (0)
40 # define trace_softirq_exit() do { } while (0)
41 # define INIT_TRACE_IRQFLAGS
44 #ifdef CONFIG_IRQSOFF_TRACER
45 extern void stop_critical_timings(void);
46 extern void start_critical_timings(void);
48 # define stop_critical_timings() do { } while (0)
49 # define start_critical_timings() do { } while (0)
52 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
54 #include <asm/irqflags.h>
56 #define local_irq_enable() \
57 do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
58 #define local_irq_disable() \
59 do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
60 #define local_irq_save(flags) \
61 do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)
63 #define local_irq_restore(flags) \
65 if (raw_irqs_disabled_flags(flags)) { \
66 raw_local_irq_restore(flags); \
67 trace_hardirqs_off(); \
69 trace_hardirqs_on(); \
70 raw_local_irq_restore(flags); \
73 #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
75 * The local_irq_*() APIs are equal to the raw_local_irq*()
78 # define raw_local_irq_disable() local_irq_disable()
79 # define raw_local_irq_enable() local_irq_enable()
80 # define raw_local_irq_save(flags) local_irq_save(flags)
81 # define raw_local_irq_restore(flags) local_irq_restore(flags)
82 #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
84 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
87 trace_hardirqs_on(); \
91 #define local_save_flags(flags) raw_local_save_flags(flags)
93 #define irqs_disabled() \
95 unsigned long _flags; \
97 raw_local_save_flags(_flags); \
98 raw_irqs_disabled_flags(_flags); \
101 #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
102 #endif /* CONFIG_X86 */