wait_on_bit_lock_io - wait for a bit to be cleared, when wanting to set it
int wait_on_bit_lock_io(unsigned long * word, int bit, unsigned mode);
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.
|January 2017||Kernel Hackers Manual 4.8.|