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(unsigned long * 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
Kernel Hackers Manual 4.8.                 January 2017                    WAIT_ON_BIT_LOCK_IO(9)