dma_pool_destroy

函数名称：dma_pool_destroy - destroys a pool of dma memory blocks.*@pool: dma pool that will be destroyed* Context: !in_interrupt()* Caller guarantees that no more memory from the pool is in use,* and that nothing will try to use the pool after this call.

函数原型：void dma_pool_destroy(struct dma_pool *pool)

返回类型：void

参数：

类型	参数	名称
struct dma_pool *	pool

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bool empty = false

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如果此条件成立可能性小(为编译器优化)(!pool)则返回

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mutex_lock( & pools_reg_lock)

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mutex_lock( & pools_lock)

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删除链表项

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如果dev且链表为空则empty = true

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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如果empty则device_remove_file(dev, & dev_attr_pools)

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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当非链表为空循环

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page等于list_entry - get the struct for this entry*@ptr: the &struct list_head pointer.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.(链表后项, structdma_page, page_list)

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如果is_page_busy(page)则

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如果dev则dev_err(dev, "dma_pool_destroy %s, %p busy\n", name, vaddr)

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否则打印错误信息("dma_pool_destroy %s, %p busy\n", name, vaddr)

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删除链表项

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否则pool_free_page(pool, page)

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**调用者**
名称	描述
dmam_pool_release	Managed DMA pool

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码