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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /* * include/linux/irqflags.h * * IRQ flags tracing: follow the state of the hardirq and softirq flags and * provide callbacks for transitions between ON and OFF states. * * This file gets included from lowlevel asm headers too, to provide * wrapped versions of the local_irq_*() APIs, based on the * raw_local_irq_*() macros from the lowlevel headers. */ #ifndef _LINUX_TRACE_IRQFLAGS_H #define _LINUX_TRACE_IRQFLAGS_H #include <linux/typecheck.h> #include <asm/irqflags.h> #ifdef CONFIG_TRACE_IRQFLAGS extern void trace_softirqs_on(unsigned long ip); extern void trace_softirqs_off(unsigned long ip); extern void trace_hardirqs_on(void); extern void trace_hardirqs_off(void); # define trace_hardirq_context(p) ((p)->hardirq_context) # define trace_softirq_context(p) ((p)->softirq_context) # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled) # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) # define trace_hardirq_exit() do { current->hardirq_context--; } while (0) # define lockdep_softirq_enter() do { current->softirq_context++; } while (0) # define lockdep_softirq_exit() do { current->softirq_context--; } while (0) # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1, #else # define trace_hardirqs_on() do { } while (0) # define trace_hardirqs_off() do { } while (0) # define trace_softirqs_on(ip) do { } while (0) # define trace_softirqs_off(ip) do { } while (0) # define trace_hardirq_context(p) 0 # define trace_softirq_context(p) 0 # define trace_hardirqs_enabled(p) 0 # define trace_softirqs_enabled(p) 0 # define trace_hardirq_enter() do { } while (0) # define trace_hardirq_exit() do { } while (0) # define lockdep_softirq_enter() do { } while (0) # define lockdep_softirq_exit() do { } while (0) # define INIT_TRACE_IRQFLAGS #endif #if defined(CONFIG_IRQSOFF_TRACER) || \ defined(CONFIG_PREEMPT_TRACER) extern void stop_critical_timings(void); extern void start_critical_timings(void); #else # define stop_critical_timings() do { } while (0) # define start_critical_timings() do { } while (0) #endif /* * Wrap the arch provided IRQ routines to provide appropriate checks. */ #define raw_local_irq_disable() arch_local_irq_disable() #define raw_local_irq_enable() arch_local_irq_enable() #define raw_local_irq_save(flags) \ do { \ typecheck(unsigned long, flags); \ flags = arch_local_irq_save(); \ } while (0) #define raw_local_irq_restore(flags) \ do { \ typecheck(unsigned long, flags); \ arch_local_irq_restore(flags); \ } while (0) #define raw_local_save_flags(flags) \ do { \ typecheck(unsigned long, flags); \ flags = arch_local_save_flags(); \ } while (0) #define raw_irqs_disabled_flags(flags) \ ({ \ typecheck(unsigned long, flags); \ arch_irqs_disabled_flags(flags); \ }) #define raw_irqs_disabled() (arch_irqs_disabled()) #define raw_safe_halt() arch_safe_halt() /* * The local_irq_*() APIs are equal to the raw_local_irq*() * if !TRACE_IRQFLAGS. */ #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT #define local_irq_enable() \ do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0) #define local_irq_disable() \ do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0) #define local_irq_save(flags) \ do { \ raw_local_irq_save(flags); \ trace_hardirqs_off(); \ } while (0) #define local_irq_restore(flags) \ do { \ if (raw_irqs_disabled_flags(flags)) { \ raw_local_irq_restore(flags); \ trace_hardirqs_off(); \ } else { \ trace_hardirqs_on(); \ raw_local_irq_restore(flags); \ } \ } while (0) #define local_save_flags(flags) \ do { \ raw_local_save_flags(flags); \ } while (0) #define irqs_disabled_flags(flags) \ ({ \ raw_irqs_disabled_flags(flags); \ }) #define irqs_disabled() \ ({ \ unsigned long _flags; \ raw_local_save_flags(_flags); \ raw_irqs_disabled_flags(_flags); \ }) #define safe_halt() \ do { \ trace_hardirqs_on(); \ raw_safe_halt(); \ } while (0) #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ #define local_irq_enable() do { raw_local_irq_enable(); } while (0) #define local_irq_disable() do { raw_local_irq_disable(); } while (0) #define local_irq_save(flags) \ do { \ raw_local_irq_save(flags); \ } while (0) #define local_irq_restore(flags) do { raw_local_irq_restore(flags); } while (0) #define local_save_flags(flags) do { raw_local_save_flags(flags); } while (0) #define irqs_disabled() (raw_irqs_disabled()) #define irqs_disabled_flags(flags) (raw_irqs_disabled_flags(flags)) #define safe_halt() do { raw_safe_halt(); } while (0) #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ #endif |