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include/linux/irqflags.h
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/* * 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 |
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#include <linux/typecheck.h> |
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#include <asm/irqflags.h> |
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#ifdef CONFIG_TRACE_IRQFLAGS |
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extern void trace_softirqs_on(unsigned long ip); extern void trace_softirqs_off(unsigned long ip); |
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extern void trace_hardirqs_on(void); extern void trace_hardirqs_off(void); |
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# 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) |
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# define lockdep_softirq_enter() do { current->softirq_context++; } while (0) # define lockdep_softirq_exit() do { current->softirq_context--; } while (0) |
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# 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) |
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# define lockdep_softirq_enter() do { } while (0) # define lockdep_softirq_exit() do { } while (0) |
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# define INIT_TRACE_IRQFLAGS #endif |
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#if defined(CONFIG_IRQSOFF_TRACER) || \ defined(CONFIG_PREEMPT_TRACER) |
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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 |
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/* * 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() |
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/* * The local_irq_*() APIs are equal to the raw_local_irq*() * if !TRACE_IRQFLAGS. */ |
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#ifdef CONFIG_TRACE_IRQFLAGS |
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#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) |
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#define local_irq_save(flags) \ do { \ |
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raw_local_irq_save(flags); \ trace_hardirqs_off(); \ } while (0) |
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#define local_irq_restore(flags) \ do { \ |
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if (raw_irqs_disabled_flags(flags)) { \ raw_local_irq_restore(flags); \ trace_hardirqs_off(); \ } else { \ trace_hardirqs_on(); \ raw_local_irq_restore(flags); \ } \ |
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} while (0) |
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#define safe_halt() \ do { \ trace_hardirqs_on(); \ raw_safe_halt(); \ |
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} while (0) |
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#else /* !CONFIG_TRACE_IRQFLAGS */ |
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#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) |
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#define safe_halt() do { raw_safe_halt(); } while (0) |
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#endif /* CONFIG_TRACE_IRQFLAGS */ #define local_save_flags(flags) raw_local_save_flags(flags) /* * Some architectures don't define arch_irqs_disabled(), so even if either * definition would be fine we need to use different ones for the time being * to avoid build issues. */ #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT #define irqs_disabled() \ ({ \ unsigned long _flags; \ raw_local_save_flags(_flags); \ raw_irqs_disabled_flags(_flags); \ }) #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ #define irqs_disabled() raw_irqs_disabled() |
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#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
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#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags) |
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#endif |