函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\bounce.c Create Date:2022-07-27 19:08:24
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：gets called "every" time someone init's a queue with BLK_BOUNCE_ISA* as the max address, so check if the pool has already been created.

函数原型：int init_emergency_isa_pool(void)

返回类型：int

参数：无

110  mutex_lock( & isa_mutex)
112  如果mempool_initialized( & isa_page_pool)则
113  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.
114  返回:0
117  ret等于mempool_init - initialize a memory pool*@pool: pointer to the memory pool that should be initialized*@min_nr: the minimum number of elements guaranteed to be* allocated for this pool.*@alloc_fn: user-defined element-allocation function.
119  BUG_ON(ret)
121  打印信息("isa pool size: %d pages\n", ISA_POOL_SIZE)
122  init_bounce_bioset()
123  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.
124  返回:0