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| 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¶
| January 2017 | Kernel Hackers Manual 4.8. |