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); |
wordthe word being waited on, a kernel virtual address
bitthe bit of the word being waited on
modethe task state to sleep in
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.