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 11:07:14
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：iomap_read_inline_data

函数原型：static void iomap_read_inline_data(struct inode *inode, struct page *page, struct iomap *iomap)

返回类型：void

参数：

类型参数名称
struct inode *inode
struct page *page
struct iomap *iomap
226  size等于NOTE: in a 32bit arch with a preemptable kernel and* an UP compile the i_size_read/write must be atomic* with respect to the local cpu (unlike with preempt disabled),* but they don't need to be atomic with respect to other cpus like in* true SMP (so they
229  如果PageUptodate(page)则返回
232  BUG_ON( Our offset within mapping. )
233  BUG_ON(size > PAGE_SIZE - offset_in_page(inline_data))
235  addr等于kmap_atomic(page)
236  memcpy(addr, inline_data, size)
237  memset(addr + size, 0, PAGE_SIZE - size)
238  Prevent people trying to call kunmap_atomic() as if it were kunmap()* kunmap_atomic() should get the return value of kmap_atomic, not the page.(addr)
239  SetPageUptodate(page)
调用者
名称描述
iomap_readpage_actor
iomap_write_begin