Table of Contents

Driver Entry and Exit points

module_init — driver initialization entry point

module_exit — driver exit entry point

Atomic and pointer manipulation

atomic_read — read atomic variable

atomic_set — set atomic variable

atomic_add — add integer to atomic variable

atomic_sub — subtract the atomic variable

atomic_sub_and_test — subtract value from variable and test result

atomic_inc — increment atomic variable

atomic_dec — decrement atomic variable

atomic_dec_and_test — decrement and test

atomic_inc_and_test — increment and test

atomic_add_negative — add and test if negative

atomic_add_return — add and return

atomic_add_unless — add unless the number is a given value

get_unaligned — get value from possibly mis-aligned location

put_unaligned — put value to a possibly mis-aligned location

Delaying, scheduling, and timer routines

pid_alive — check that a task structure is not stale

is_init — check if a task structure is init

__wake_up — wake up threads blocked on a waitqueue.

__wake_up_sync — wake up threads blocked on a waitqueue.

task_nice — return the nice value of a given task.

sched_setscheduler — change the scheduling policy and/or RT priority of

yield — yield the current processor to other threads.

__round_jiffies — function to round jiffies to a full second

__round_jiffies_relative — function to round jiffies to a full second

round_jiffies — function to round jiffies to a full second

round_jiffies_relative — function to round jiffies to a full second

init_timer — initialize a timer.

mod_timer — modify a timer's timeout

del_timer — deactive a timer.

del_timer_sync — deactivate a timer and wait for the handler to finish.

getnstimeofday — Returns the time of day in a timespec

do_gettimeofday — Returns the time of day in a timeval

do_settimeofday — Sets the time of day

schedule_timeout — sleep until timeout

msleep — sleep safely even with waitqueue interruptions

msleep_interruptible — sleep waiting for signals

High-resolution timers

ktime_set — Set a ktime_t variable from a seconds/nanoseconds value

ktime_sub — subtract two ktime_t variables

ktime_add — add two ktime_t variables

ktime_add_ns — Add a scalar nanoseconds value to a ktime_t variable

timespec_to_ktime — convert a timespec to ktime_t format

timeval_to_ktime — convert a timeval to ktime_t format

ktime_to_timespec — convert a ktime_t variable to timespec format

ktime_to_timeval — convert a ktime_t variable to timeval format

ktime_to_ns — convert a ktime_t variable to scalar nanoseconds

struct hrtimer — the basic hrtimer structure

struct hrtimer_sleeper — simple sleeper structure

struct hrtimer_base — the timer base for a specific clock

ktime_get_real — get the real (wall-) time in ktime_t format

ktime_get_ts — get the monotonic clock in timespec format

hrtimer_start — (re)start an relative timer on the current CPU

hrtimer_try_to_cancel — try to deactivate a timer

hrtimer_cancel — cancel a timer and wait for the handler to finish.

hrtimer_get_remaining — get remaining time for the timer

hrtimer_init — initialize a timer to the given clock

hrtimer_get_res — get the timer resolution for a clock

Workqueues and Kevents

run_scheduled_work — run scheduled work synchronously

queue_work — queue work on a workqueue

queue_delayed_work — queue work on a workqueue after delay

queue_delayed_work_on — queue work on specific CPU after delay

flush_workqueue — ensure that any scheduled work has run to completion.

destroy_workqueue — safely terminate a workqueue

schedule_work — put work task in global workqueue

schedule_delayed_work — put work task in global workqueue after delay

schedule_delayed_work_on — queue work in global workqueue on CPU after delay

cancel_rearming_delayed_workqueue — reliably kill off a delayed

cancel_rearming_delayed_work — reliably kill off a delayed keventd

execute_in_process_context — reliably execute the routine with user context

Internal Functions

reparent_to_init — Reparent the calling kernel thread to the init task

sys_tgkill — send signal to one specific thread

kthread_run — create and wake a thread.

kthread_should_stop — should this kthread return now?

kthread_create — create a kthread.

kthread_bind — bind a just-created kthread to a cpu.

kthread_stop — stop a thread created by kthread_create.

Kernel objects manipulation

kobject_get_path — generate and return the path associated with a given kobj

kobject_init — initialize object.

kobject_add — add an object to the hierarchy.

kobject_register — initialize and add an object.

kobject_set_name — Set the name of an object

kobject_del — unlink kobject from hierarchy.

kobject_unregister — remove object from hierarchy and decrement refcount.

kobject_get — increment refcount for object.

kobject_put — decrement refcount for object.

kset_register — initialize and add a kset.

kset_unregister — remove a kset.

subsystem_register — register a subsystem.

subsys_create_file — export sysfs attribute file.

Kernel utility functions

container_of — cast a member of a structure out to the containing structure

printk — print a kernel message

acquire_console_sem — lock the console system for exclusive use.

release_console_sem — unlock the console system

console_conditional_schedule — yield the CPU if required

printk_timed_ratelimit — caller-controlled printk ratelimiting

panic — halt the system

atomic_notifier_chain_register — Add notifier to an atomic notifier chain

atomic_notifier_chain_unregister — Remove notifier from an atomic notifier chain

atomic_notifier_call_chain — Call functions in an atomic notifier chain

blocking_notifier_chain_register — Add notifier to a blocking notifier chain

blocking_notifier_chain_unregister — Remove notifier from a blocking notifier chain

blocking_notifier_call_chain — Call functions in a blocking notifier chain

raw_notifier_chain_register — Add notifier to a raw notifier chain

raw_notifier_chain_unregister — Remove notifier from a raw notifier chain

raw_notifier_call_chain — Call functions in a raw notifier chain

srcu_notifier_chain_register — Add notifier to an SRCU notifier chain

srcu_notifier_chain_unregister — Remove notifier from an SRCU notifier chain

srcu_notifier_call_chain — Call functions in an SRCU notifier chain

srcu_init_notifier_head — Initialize an SRCU notifier head

register_reboot_notifier — Register function to be called at reboot time

unregister_reboot_notifier — Unregister previously registered reboot notifier

emergency_restart — reboot the system

kernel_restart — reboot the system

kernel_halt — halt the system

kernel_power_off — power_off the system

call_rcu — Queue an RCU callback for invocation after a grace period.

call_rcu_bh — Queue an RCU for invocation after a quicker grace period.

rcu_barrier — Wait until all the in-flight RCUs are complete.

synchronize_rcu — wait until a grace period has elapsed.