1WAIT_ON_ATOMIC_T(9)              Driver Basics             WAIT_ON_ATOMIC_T(9)
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NAME

6       wait_on_atomic_t - Wait for an atomic_t to become 0
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SYNOPSIS

9       int wait_on_atomic_t(atomic_t * val, int (*action) (atomic_t *),
10                            unsigned mode);
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ARGUMENTS

13       val
14           The atomic value being waited on, a kernel virtual address
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16       action
17           the function used to sleep, which may take special actions
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19       mode
20           the task state to sleep in
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DESCRIPTION

23       Wait for an atomic_t to become 0. We abuse the bit-wait waitqueue table
24       for the purpose of getting a waitqueue, but we set the key to a bit
25       number outside of the target 'word'.
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28Kernel Hackers Manual 3.10         June 2019               WAIT_ON_ATOMIC_T(9)
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