You create and initialize a mutex in one operation through the DEFINE_MUTEX macro.

可以通过DEFINE _ mutex宏使用一个操作创建和初始化互斥锁。

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Notice that when we invoke the operation, we don't bother to initialize either the owner or balance parameters.

注意，当我们调用这个操作时，无需初始化owner或balance参数。

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The component doesn't re-initialize - an operation that could be expensive.

组件不用重新初始化——该操作可能会比较昂贵。

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