tjh.dev
+7
-1
include/linux/percpu-refcount.h
+7
-1
include/linux/percpu-refcount.h
···
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/* paired with smp_store_release() in percpu_ref_reinit() */
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smp_read_barrier_depends();
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if (unlikely(percpu_ptr & __PERCPU_REF_ATOMIC))
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/*
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* Theoretically, the following could test just ATOMIC; however,
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* then we'd have to mask off DEAD separately as DEAD may be
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* visible without ATOMIC if we race with percpu_ref_kill(). DEAD
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* implies ATOMIC anyway. Test them together.
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*/
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if (unlikely(percpu_ptr & __PERCPU_REF_ATOMIC_DEAD))
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return false;
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*percpu_countp = (unsigned long __percpu *)percpu_ptr;