函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\gup.c Create Date:2022-07-27 15:59:41
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：follow_pfn_pte

函数原型：static int follow_pfn_pte(struct vm_area_struct *vma, unsigned long address, pte_t *pte, unsigned int flags)

返回类型：int

参数：

类型参数名称
struct vm_area_struct *vma
unsigned longaddress
pte_t *pte
unsigned intflags
143  如果flags按位与do get_page on page 则返回:负EFAULT
146  如果flags按位与mark page accessed 则
147  entry等于pte
149  如果flags按位与check pte is writable 则entry等于pte_mkdirty(entry)
151  entry等于pte_mkyoung(entry)
153  如果非pte_same( * pte, entry)则
154  set_pte_at(The address space we belong to. , address, pte, entry)
155  The x86 doesn't have any external MMU info: the kernel page* tables contain all the necessary information.
160  返回:负EEXIST
调用者
名称描述
follow_page_pte