1WAIT_ON_BIT_IO(9)                Driver Basics               WAIT_ON_BIT_IO(9)
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NAME

6       wait_on_bit_io - wait for a bit to be cleared
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SYNOPSIS

9       int wait_on_bit_io(void * word, int bit, unsigned mode);
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ARGUMENTS

12       word
13           the word being waited on, a kernel virtual address
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15       bit
16           the bit of the word being waited on
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18       mode
19           the task state to sleep in
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DESCRIPTION

22       Use the standard hashed waitqueue table to wait for a bit to be
23       cleared. This is similar to wait_on_bit, but calls io_schedule instead
24       of schedule for the actual waiting.
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26       Returned value will be zero if the bit was cleared, or non-zero if the
27       process received a signal and the mode permitted wakeup on that signal.
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30Kernel Hackers Manual 3.10         June 2019                 WAIT_ON_BIT_IO(9)
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