1ATOMIC_DEC(9) Driver Basics ATOMIC_DEC(9)
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6 atomic_dec - decrement atomic variable
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9 void atomic_dec(atomic_t * v);
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12 v
13 pointer of type atomic_t
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16 Atomically decrements v by 1.
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19Kernel Hackers Manual 2.6. June 2019 ATOMIC_DEC(9)