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
Kernel Hackers Manual 4.8.                 January 2017                         WAIT_EVENT_CMD(9)