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 16:01:34
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：We can leverage the VM_FAULT_RETRY functionality in the page fault* paths better by using either get_user_pages_locked() or* get_user_pages_unlocked().* get_user_pages_locked() is suitable to replace the form:* down_read(&mm->mmap_sem);* do_something()

函数原型：long get_user_pages_locked(unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **pages, int *locked)

返回类型：long

参数：

类型参数名称
unsigned longstart
unsigned longnr_pages
unsigned intgup_flags
struct page **pages
int *locked
1661  如果WARN_ON_ONCE(gup_flags & mapping lifetime is indefinite: see below )则返回:负EINVAL
1664  返回:__get_user_pages_locked(当前进程, mm, start, nr_pages, pages, NULL, locked, gup_flags | mark page accessed )
调用者
名称描述
lookup_node
get_vaddr_framesget_vaddr_frames() - map virtual addresses to pfns*@start: starting user address*@nr_frames: number of pages / pfns from start to map*@gup_flags: flags modifying lookup behaviour*@vec: structure which receives pages / pfns of the addresses mapped.