WAIT_ON_ATOMIC_T(9)                       Driver Basics                       WAIT_ON_ATOMIC_T(9)



NAME
       wait_on_atomic_t - Wait for an atomic_t to become 0

SYNOPSIS
       int wait_on_atomic_t(atomic_t * val, int (*action) (atomic_t *), unsigned mode);

ARGUMENTS
       val
           The atomic value being waited on, a kernel virtual address

       action
           the function used to sleep, which may take special actions

       mode
           the task state to sleep in

DESCRIPTION
       Wait for an atomic_t to become 0. We abuse the bit-wait waitqueue table for the purpose of
       getting a waitqueue, but we set the key to a bit number outside of the target 'word'.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                       WAIT_ON_ATOMIC_T(9)