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| WAIT_ON_BIT_ACTION(9) | Driver Basics | WAIT_ON_BIT_ACTION(9) |
NAME¶
wait_on_bit_action - wait for a bit to be clearedSYNOPSIS¶
int
wait_on_bit_action(unsigned long * word,
int bit,
wait_bit_action_f * action,
unsigned mode);
ARGUMENTS¶
wordthe word being waited on, a kernel virtual address
bit
the bit of the word being waited on
action
the function used to sleep, which may take special
actions
mode
the task state to sleep in
DESCRIPTION¶
Use the standard hashed waitqueue table to wait for a bit to be cleared, and allow the waiting action to be specified. This is like wait_on_bit but allows fine control of how the waiting is done. Returned value will be zero if the bit was cleared, or non-zero if the process received a signal and the mode permitted wakeup on that signal.COPYRIGHT¶
| January 2017 | Kernel Hackers Manual 4.8. |