1WAIT_ON_BIT_LOCK_ACT(9)          Driver Basics         WAIT_ON_BIT_LOCK_ACT(9)
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NAME

6       wait_on_bit_lock_action - wait for a bit to be cleared, when wanting to
7       set it
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SYNOPSIS

10       int wait_on_bit_lock_action(void * word, int bit,
11                                   wait_bit_action_f * action, unsigned mode);
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ARGUMENTS

14       word
15           the word being waited on, a kernel virtual address
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17       bit
18           the bit of the word being waited on
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20       action
21           the function used to sleep, which may take special actions
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23       mode
24           the task state to sleep in
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DESCRIPTION

27       Use the standard hashed waitqueue table to wait for a bit to be cleared
28       and then to set it, and allow the waiting action to be specified. This
29       is like wait_on_bit but allows fine control of how the waiting is done.
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31       Returns zero if the bit was (eventually) found to be clear and was set.
32       Returns non-zero if a signal was delivered to the process and the mode
33       allows that signal to wake the process.
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36Kernel Hackers Manual 3.10         June 2019           WAIT_ON_BIT_LOCK_ACT(9)
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