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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272/* SPDX-License-Identifier: GPL-2.0 *//* * 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/irqflags_types.h>#include <linux/typecheck.h>#include <linux/cleanup.h>#include <asm/irqflags.h>#include <asm/percpu.h>
struct task_struct;
/* Currently lockdep_softirqs_on/off is used only by lockdep */#ifdef CONFIG_PROVE_LOCKING extern void lockdep_softirqs_on(unsigned long ip); extern void lockdep_softirqs_off(unsigned long ip); extern void lockdep_hardirqs_on_prepare(void); extern void lockdep_hardirqs_on(unsigned long ip); extern void lockdep_hardirqs_off(unsigned long ip); extern void lockdep_cleanup_dead_cpu(unsigned int cpu, struct task_struct *idle);#else static inline void lockdep_softirqs_on(unsigned long ip) { } static inline void lockdep_softirqs_off(unsigned long ip) { } static inline void lockdep_hardirqs_on_prepare(void) { } static inline void lockdep_hardirqs_on(unsigned long ip) { } static inline void lockdep_hardirqs_off(unsigned long ip) { } static inline void lockdep_cleanup_dead_cpu(unsigned int cpu, struct task_struct *idle) {}#endif
#ifdef CONFIG_TRACE_IRQFLAGS
DECLARE_PER_CPU(int, hardirqs_enabled);DECLARE_PER_CPU(int, hardirq_context);
extern void trace_hardirqs_on_prepare(void);extern void trace_hardirqs_off_finish(void);extern void trace_hardirqs_on(void);extern void trace_hardirqs_off(void);
# define lockdep_hardirq_context() (raw_cpu_read(hardirq_context))# define lockdep_softirq_context(p) ((p)->softirq_context)# define lockdep_hardirqs_enabled() (this_cpu_read(hardirqs_enabled))# define lockdep_softirqs_enabled(p) ((p)->softirqs_enabled)# define lockdep_hardirq_enter() \do { \ if (__this_cpu_inc_return(hardirq_context) == 1)\ current->hardirq_threaded = 0; \} while (0)# define lockdep_hardirq_threaded() \do { \ current->hardirq_threaded = 1; \} while (0)# define lockdep_hardirq_exit() \do { \ __this_cpu_dec(hardirq_context); \} while (0)
# define lockdep_hrtimer_enter(__hrtimer) \({ \ bool __expires_hardirq = true; \ \ if (!__hrtimer->is_hard) { \ current->irq_config = 1; \ __expires_hardirq = false; \ } \ __expires_hardirq; \})
# define lockdep_hrtimer_exit(__expires_hardirq) \ do { \ if (!__expires_hardirq) \ current->irq_config = 0; \ } while (0)
# define lockdep_posixtimer_enter() \ do { \ current->irq_config = 1; \ } while (0)
# define lockdep_posixtimer_exit() \ do { \ current->irq_config = 0; \ } while (0)
# define lockdep_irq_work_enter(_flags) \ do { \ if (!((_flags) & IRQ_WORK_HARD_IRQ)) \ current->irq_config = 1; \ } while (0)# define lockdep_irq_work_exit(_flags) \ do { \ if (!((_flags) & IRQ_WORK_HARD_IRQ)) \ current->irq_config = 0; \ } while (0)
#else# define trace_hardirqs_on_prepare() do { } while (0)# define trace_hardirqs_off_finish() do { } while (0)# define trace_hardirqs_on() do { } while (0)# define trace_hardirqs_off() do { } while (0)# define lockdep_hardirq_context() 0# define lockdep_softirq_context(p) 0# define lockdep_hardirqs_enabled() 0# define lockdep_softirqs_enabled(p) 0# define lockdep_hardirq_enter() do { } while (0)# define lockdep_hardirq_threaded() do { } while (0)# define lockdep_hardirq_exit() do { } while (0)# define lockdep_softirq_enter() do { } while (0)# define lockdep_softirq_exit() do { } while (0)# define lockdep_hrtimer_enter(__hrtimer) false# define lockdep_hrtimer_exit(__context) do { (void)(__context); } while (0)# define lockdep_posixtimer_enter() do { } while (0)# define lockdep_posixtimer_exit() do { } while (0)# define lockdep_irq_work_enter(__work) do { } while (0)# define lockdep_irq_work_exit(__work) do { } while (0)#endif
#if defined(CONFIG_TRACE_IRQFLAGS) && !defined(CONFIG_PREEMPT_RT)# define lockdep_softirq_enter() \do { \ current->softirq_context++; \} while (0)# define lockdep_softirq_exit() \do { \ current->softirq_context--; \} while (0)
#else# define lockdep_softirq_enter() do { } while (0)# define lockdep_softirq_exit() do { } while (0)#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
#ifdef CONFIG_DEBUG_IRQFLAGSextern void warn_bogus_irq_restore(void);#define raw_check_bogus_irq_restore() \ do { \ if (unlikely(!arch_irqs_disabled())) \ warn_bogus_irq_restore(); \ } while (0)#else#define raw_check_bogus_irq_restore() 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); \ raw_check_bogus_irq_restore(); \ 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
#define local_irq_enable() \ do { \ trace_hardirqs_on(); \ raw_local_irq_enable(); \ } while (0)
#define local_irq_disable() \ do { \ bool was_disabled = raw_irqs_disabled();\ raw_local_irq_disable(); \ if (!was_disabled) \ trace_hardirqs_off(); \ } while (0)
#define local_irq_save(flags) \ do { \ raw_local_irq_save(flags); \ if (!raw_irqs_disabled_flags(flags)) \ trace_hardirqs_off(); \ } while (0)
#define local_irq_restore(flags) \ do { \ if (!raw_irqs_disabled_flags(flags)) \ trace_hardirqs_on(); \ raw_local_irq_restore(flags); \ } while (0)
#define safe_halt() \ do { \ trace_hardirqs_on(); \ raw_safe_halt(); \ } while (0)
#else /* !CONFIG_TRACE_IRQFLAGS */
#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 safe_halt() do { raw_safe_halt(); } while (0)
#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()#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
DEFINE_LOCK_GUARD_0(irq, local_irq_disable(), local_irq_enable())DEFINE_LOCK_GUARD_0(irqsave, local_irq_save(_T->flags), local_irq_restore(_T->flags), unsigned long flags)
#endif