kernel/rcu/rcu.h

Source file repositories/reference/linux-study-clean/kernel/rcu/rcu.h

File Facts

System
Linux kernel
Corpus path
kernel/rcu/rcu.h
Extension
.h
Size
22463 bytes
Lines
699
Domain
Core OS
Bucket
Scheduler, Processes, Timers, Sync, And Syscalls
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline bool rcu_gp_is_normal(void) { return true; }
static inline bool rcu_gp_is_expedited(void) { return false; }
static inline bool rcu_async_should_hurry(void) { return false; }
static inline void rcu_expedite_gp(void) { }
static inline void rcu_unexpedite_gp(void) { }
static inline void rcu_async_hurry(void) { }
static inline void rcu_async_relax(void) { }
static inline bool rcu_cpu_online(int cpu) { return true; }
#else /* #ifdef CONFIG_TINY_RCU */
bool rcu_gp_is_normal(void);     /* Internal RCU use. */
bool rcu_gp_is_expedited(void);  /* Internal RCU use. */
bool rcu_async_should_hurry(void);  /* Internal RCU use. */
void rcu_expedite_gp(void);
void rcu_unexpedite_gp(void);
void rcu_async_hurry(void);
void rcu_async_relax(void);
void rcupdate_announce_bootup_oddness(void);
bool rcu_cpu_online(int cpu);
#ifdef CONFIG_TASKS_RCU_GENERIC
void show_rcu_tasks_gp_kthreads(void);
#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
static inline void show_rcu_tasks_gp_kthreads(void) {}
#endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */
#endif /* #else #ifdef CONFIG_TINY_RCU */

#ifdef CONFIG_TASKS_RCU
struct task_struct *get_rcu_tasks_gp_kthread(void);
void rcu_tasks_get_gp_data(int *flags, unsigned long *gp_seq);
#endif // # ifdef CONFIG_TASKS_RCU

#ifdef CONFIG_TASKS_RUDE_RCU
struct task_struct *get_rcu_tasks_rude_gp_kthread(void);
void rcu_tasks_rude_get_gp_data(int *flags, unsigned long *gp_seq);
#endif // # ifdef CONFIG_TASKS_RUDE_RCU

#ifdef CONFIG_TASKS_RCU_GENERIC
void tasks_cblist_init_generic(void);
#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
static inline void tasks_cblist_init_generic(void) { }
#endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */

#define RCU_SCHEDULER_INACTIVE	0
#define RCU_SCHEDULER_INIT	1
#define RCU_SCHEDULER_RUNNING	2

enum rcutorture_type {
	RCU_FLAVOR,
	RCU_TASKS_FLAVOR,
	RCU_TASKS_RUDE_FLAVOR,
	RCU_TASKS_TRACING_FLAVOR,
	RCU_TRIVIAL_FLAVOR,
	SRCU_FLAVOR,
	INVALID_RCU_FLAVOR
};

#if defined(CONFIG_RCU_LAZY)
unsigned long rcu_get_jiffies_lazy_flush(void);
void rcu_set_jiffies_lazy_flush(unsigned long j);
#else
static inline unsigned long rcu_get_jiffies_lazy_flush(void) { return 0; }
static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
#endif

#if defined(CONFIG_TREE_RCU)
void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq);
void do_trace_rcu_torture_read(const char *rcutorturename,
			       struct rcu_head *rhp,
			       unsigned long secs,
			       unsigned long c_old,
			       unsigned long c);
void rcu_gp_set_torture_wait(int duration);
void rcu_set_gpwrap_lag(unsigned long lag);
int rcu_get_gpwrap_count(int cpu);
#else
static inline void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq)
{
	*flags = 0;
	*gp_seq = 0;
}
#ifdef CONFIG_RCU_TRACE
void do_trace_rcu_torture_read(const char *rcutorturename,
			       struct rcu_head *rhp,
			       unsigned long secs,
			       unsigned long c_old,
			       unsigned long c);
#else
#define do_trace_rcu_torture_read(rcutorturename, rhp, secs, c_old, c) \
	do { } while (0)
#endif
static inline void rcu_gp_set_torture_wait(int duration) { }

Annotation

Implementation Notes