1WAIT_ON_BIT_ACTION(9)            Driver Basics           WAIT_ON_BIT_ACTION(9)
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NAME

6       wait_on_bit_action - wait for a bit to be cleared
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SYNOPSIS

9       int wait_on_bit_action(void * word, int bit,
10                              wait_bit_action_f * action, unsigned mode);
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ARGUMENTS

13       word
14           the word being waited on, a kernel virtual address
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16       bit
17           the bit of the word being waited on
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19       action
20           the function used to sleep, which may take special actions
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22       mode
23           the task state to sleep in
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DESCRIPTION

26       Use the standard hashed waitqueue table to wait for a bit to be
27       cleared, and allow the waiting action to be specified. This is like
28       wait_on_bit but allows fine control of how the waiting is done.
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30       Returned value will be zero if the bit was cleared, or non-zero if the
31       process received a signal and the mode permitted wakeup on that signal.
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34Kernel Hackers Manual 3.10         June 2019             WAIT_ON_BIT_ACTION(9)
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