我在Linux内核2.6.43中的handle.c中找到了两个struct irq_desc * irq_to_desc(unsigned int irq)函数声明。struct irq_desc *irq_to_desc(unsigned int irq) { return radix_tree_lookup(&irq_desc_tree, irq); }和struct irq_desc *irq_to_desc(unsigned int irq) { return radix_tree_lookup(&irq_desc_tree, irq); }它们在一个文件中。但是,为什么该文件可以成功编译?
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