函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\power\snapshot.c Create Date:2022-07-27 11:01:24
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：swsusp_alloc - Allocate memory for hibernation image

函数原型：static int swsusp_alloc(struct memory_bitmap *copy_bm, unsigned int nr_pages, unsigned int nr_highmem)

返回类型：int

参数：

类型参数名称
struct memory_bitmap *copy_bm
unsigned intnr_pages
unsigned intnr_highmem
1948  如果nr_highmem大于0则
1949  如果get_highmem_buffer(PG_ANY)则转到:err_out
1951  如果nr_highmem大于Numbers of normal and highmem page frames allocated for hibernation image* before suspending devices.则
1952  nr_highmem减等于Numbers of normal and highmem page frames allocated for hibernation image* before suspending devices.
1953  nr_pages加等于alloc_highmem_pages(copy_bm, nr_highmem)
1956  如果nr_pages大于Numbers of normal and highmem page frames allocated for hibernation image* before suspending devices.则
1957  nr_pages减等于Numbers of normal and highmem page frames allocated for hibernation image* before suspending devices.
1958  当nr_pages自减大于0循环
1961  page等于alloc_image_page(DOC: Useful GFP flag combinations* Useful GFP flag combinations* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~* Useful GFP flag combinations that are commonly used. It is recommended* that subsystems start with one of these combinations and then set/clear)
1962  如果非page则转到:err_out
1964  memory_bm_set_bit(copy_bm, page_to_pfn(page))
1968  返回:0
1970  err_out :
1971  swsusp_free - Free pages allocated for hibernation image.* Image pages are alocated before snapshot creation, so they need to be* released after resume.
1972  返回:负ENOMEM
调用者
名称描述
swsusp_save