0,0 → 1,150 |
/* |
* 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 |