函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\iomap\buffered-io.c Create Date:2022-07-29 11:07:13
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：iomap_iop_set_range_uptodate

函数原型：static void iomap_iop_set_range_uptodate(struct page *page, unsigned off, unsigned len)

返回类型：void

参数：

类型参数名称
struct page *page
unsignedoff
unsignedlen
146  iop等于to_iomap_page(page)
147  inode等于host
148  first等于off右移i_blkbits位
149  last等于off加len减1右移i_blkbits位
150  bool uptodate = true
154  spin_lock_irqsave( & uptodate_lock, flags)
155  以i小于PAGE_SIZE除i_blocksize(inode)循环
156  如果i大于等于first且i小于等于last则设置内存位
158  否则如果非st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则uptodate = false
162  如果uptodate则SetPageUptodate(page)
164  spin_unlock_irqrestore( & uptodate_lock, flags)
调用者
名称描述
iomap_set_range_uptodate