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WAIT_EVENT_CMD(9) Driver Basics WAIT_EVENT_CMD(9)

NAME

wait_event_cmd - sleep until a condition gets true

SYNOPSIS

wait_event_cmd(wq, condition, cmd1, cmd2);

ARGUMENTS

wq
the waitqueue to wait on
condition
a C expression for the event to wait for
cmd1
the command will be executed before sleep
cmd2
the command will be executed after sleep

DESCRIPTION

The process is put to sleep (TASK_UNINTERRUPTIBLE) until the condition evaluates to true. The condition is checked each time the waitqueue wq is woken up.
 
wake_up has to be called after changing any variable that could change the result of the wait condition.

COPYRIGHT

February 2017 Kernel Hackers Manual 3.16