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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/mips/include/asm/spinlock.h
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@@ -11,6 +11,21 @@
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 #include <asm/processor.h>
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 #include <asm/qrwlock.h>
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+
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+#include <asm-generic/qspinlock_types.h>
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+
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+#define	queued_spin_unlock queued_spin_unlock
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+/**
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+ * queued_spin_unlock - release a queued spinlock
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+ * @lock : Pointer to queued spinlock structure
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+ */
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+static inline void queued_spin_unlock(struct qspinlock *lock)
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+{
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+	/* This could be optimised with ARCH_HAS_MMIOWB */
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+	mmiowb();
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+	smp_store_release(&lock->locked, 0);
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+}
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+
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 #include <asm/qspinlock.h>
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 #endif /* _ASM_SPINLOCK_H */