swap_free

函数名称：swap_free

函数原型：static inline void swap_free(swp_entry_t swp)

返回类型：void

参数：

类型	参数	名称
swp_entry_t	swp

**调用者**
名称	描述
alloc_swapdev_block	alloc_swapdev_block - allocate a swap page and register that it has* been allocated, so that it can be freed in case of an error.
do_swap_page	We enter with non-exclusive mmap_sem (to exclude vma changes,* but allow concurrent faults), and pte mapped but not yet locked.* We return with pte unmapped and unlocked.* We return with the mmap_sem locked or unlocked in the same cases
free_all_swap_pages	_all_swap_pages - free swap pages allocated for saving image data.* It also frees the extents used to register which swap entries had been* allocated.

函数逻辑报告