123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 |
- /*
- * 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
- #ifdef CONFIG_TRACE_IRQFLAGS
- extern void trace_hardirqs_on(void);
- extern void trace_hardirqs_off(void);
- extern void trace_softirqs_on(unsigned long ip);
- extern void trace_softirqs_off(unsigned long ip);
- # 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 trace_softirq_enter() do { current->softirq_context++; } while (0)
- # define trace_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 trace_softirq_enter() do { } while (0)
- # define trace_softirq_exit() do { } while (0)
- # define INIT_TRACE_IRQFLAGS
- #endif
- #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
- #include <asm/irqflags.h>
- #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)
- #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
- /*
- * The local_irq_*() APIs are equal to the raw_local_irq*()
- * if !TRACE_IRQFLAGS.
- */
- # define raw_local_irq_disable() local_irq_disable()
- # define raw_local_irq_enable() local_irq_enable()
- # define raw_local_irq_save(flags) local_irq_save(flags)
- # define raw_local_irq_restore(flags) local_irq_restore(flags)
- #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
- #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
- #define safe_halt() \
- do { \
- trace_hardirqs_on(); \
- raw_safe_halt(); \
- } while (0)
- #define local_save_flags(flags) raw_local_save_flags(flags)
- #define irqs_disabled() \
- ({ \
- unsigned long flags; \
- \
- raw_local_save_flags(flags); \
- raw_irqs_disabled_flags(flags); \
- })
- #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
- #endif /* CONFIG_X86 */
- #endif
|