Kernel utility functions
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Chapter 1. Driver Basics
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Kernel utility functions
Table of Contents
upper_32_bits
- return bits 32-63 of a number
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.