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| WAIT_ON_BIT_IO(9) | Driver Basics | WAIT_ON_BIT_IO(9) |
NAME¶
wait_on_bit_io - wait for a bit to be clearedSYNOPSIS¶
int
wait_on_bit_io(unsigned long * word,
int bit, unsigned mode);
ARGUMENTS¶
wordthe word being waited on, a kernel virtual address
bit
the bit of the word being waited on
mode
the task state to sleep in
DESCRIPTION¶
Use the standard hashed waitqueue table to wait for a bit to be cleared. This is similar to wait_on_bit, but calls io_schedule instead of schedule for the actual waiting. 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. |