函数逻辑报告

函数名称：Lookup a swap entry in the swap cache. A found page will be returned* unlocked and with its refcount incremented - we rely on the kernel* lock getting page table operations atomic even if we drop the page* lock before returning.

函数原型：struct page *lookup_swap_cache(swp_entry_t entry, struct vm_area_struct *vma, unsigned long addr)

返回类型：struct page

参数：