table of contents
| WAIT_ON_BIT_IO(9) | Driver Basics | WAIT_ON_BIT_IO(9) |
NAME¶
wait_on_bit_io - wait for a bit to be cleared
SYNOPSIS¶
int wait_on_bit_io(void * word, int bit, unsigned mode);
ARGUMENTS¶
word
the 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¶
| June 2024 | Kernel Hackers Manual 3.10 |