函数逻辑报告

函数名称：@entry: swap entry for which we allocate swap cache.* Called when allocating swap cache for existing swap entry,* This can return error codes. Returns 0 at success.* -EBUSY means there is a swap cache.* Note: return code is different from swap_duplicate().

函数原型：int swapcache_prepare(swp_entry_t entry)

返回类型：int

参数：