table of contents
| WAIT_ON_BIT_LOCK_IO(9) | Driver Basics | WAIT_ON_BIT_LOCK_IO(9) |
NAME¶
wait_on_bit_lock_io - wait for a bit to be cleared, when wanting to set it
SYNOPSIS¶
int wait_on_bit_lock_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 and then to atomically set it. This is similar to wait_on_bit, but calls io_schedule instead of schedule for the actual waiting.
Returns zero if the bit was (eventually) found to be clear and was set. Returns non-zero if a signal was delivered to the process and the mode allows that signal to wake the process.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |