函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swapfile.c Create Date:2022-07-27 16:50:37
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：Increase reference count of swap entry by 1

函数原型：int swap_duplicate(swp_entry_t entry)

返回类型：int

参数：

类型参数名称
swp_entry_tentry
3467  err等于0
3469  当非err且Verify that a swap entry is valid and increment its swap map count.* Returns error code in following case.* - success -> 0* - swp_entry is invalid -> EINVAL* - swp_entry is migration entry -> EINVAL恒等于负ENOMEM循环
3470  err等于add_swap_count_continuation - called when a swap count is duplicated* beyond SWAP_MAP_MAX, it allocates a new page and links that to the entry's* page of the original vmalloc'ed swap_map, to hold the continuation count
3471  返回:err
调用者
名称描述
try_to_unmap_one@arg: enum ttu_flags will be passed to this argument