函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\genalloc.c Create Date:2022-07-27 07:54:04
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：返回内存动态地址

函数原型：phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr)

返回类型：phys_addr_t

参数：

类型参数名称
struct gen_pool *pool
unsigned longaddr
218  paddr等于负1
220  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
222  如果addr大于等于start address of memory chunk 且addr小于等于d address of memory chunk (inclusive) 则
223  paddr等于physical starting address of memory chunk 加addr减start address of memory chunk
224  退出
227  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
229  返回:paddr
调用者
名称描述
gen_pool_dma_alloc_algogen_pool_dma_alloc_algo - allocate special memory from the pool for DMA* usage with the given pool algorithm*@pool: pool to allocate from*@size: number of bytes to allocate from the pool*@dma: DMA-view physical address return value