函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\dax.c Create Date:2022-07-29 10:56:18
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：dax_is_empty_entry

函数原型：static int dax_is_empty_entry(void *entry)

返回类型：int

参数：

类型参数名称
void *entry
122  返回:xa_to_value() - Get value stored in an XArray entry.*@entry: XArray entry.* Context: Any context.* Return: The value stored in the XArray entry.按位与DAX_EMPTY
调用者
名称描述
dax_entry_size
grab_mapping_entryFind page cache entry at given index. If it is a DAX entry, return it* with the entry locked. If the page cache doesn't contain an entry at* that index, add a locked empty entry.* When requesting an entry with size DAX_PMD, grab_mapping_entry() will
dax_insert_entryBy this point grab_mapping_entry() has ensured that we have a locked entry* of the appropriate size so we don't have to worry about downgrading PMDs to* PTEs
dax_writeback_one