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 10:56:20
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Return: The entry stored at this location before it was locked.

函数原型：static void *dax_lock_entry(struct xa_state *xas, void *entry)

返回类型：void

参数：

类型参数名称
struct xa_state *xas
void *entry
297  v等于xa_to_value() - Get value stored in an XArray entry.*@entry: XArray entry.* Context: Any context.* Return: The value stored in the XArray entry.
298  返回:xas_store() - Store this entry in the XArray
调用者
名称描述
dax_lock_pagedax_lock_mapping_entry - Lock the DAX entry corresponding to a page*@page: The page whose entry we want to lock* Context: Process context.* Return: A cookie to pass to dax_unlock_page() or 0 if the entry could* not be locked.
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
dax_insert_pfn_mkwritedax_insert_pfn_mkwrite - insert PTE or PMD entry into page tables*@vmf: The description of the fault*@pfn: PFN to insert*@order: Order of entry to insert.* This function inserts a writeable PTE or PMD entry into the page tables* for an mmaped DAX file