函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\filemap.c Create Date:2022-07-27 15:24:31
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__lock_page - get a lock on the page, assuming we need to sleep to get it*@__page: the page to lock

函数原型：void __lock_page(struct page *__page)

返回类型：void

参数：

类型参数名称
struct page *__page
1381  page等于compound_head(__page)
1382  q等于page_waitqueue(page)
1383  wait_on_page_bit_common(q, page, PG_locked, 深度睡眠态, Hold ref to page and take the bit when woken, like* __lock_page() waiting on then setting PG_locked.)
调用者
名称描述
__lock_page_or_retryReturn values:* 1 - page is locked; mmap_sem is still held
lock_page_maybe_drop_mmaplock_page_maybe_drop_mmap - lock the page, possibly dropping the mmap_sem*@vmf - the vm_fault for this fault.*@page - the page to lock.*@fpin - the pointer to the file we may pin (or is already pinned).
lock_pagelock_page may only be called if we have the page's inode pinned.