mapping_gfp_constraint

函数名称：Restricts the given gfp_mask to what the mapping allows.

函数原型：static inline gfp_t mapping_gfp_constraint(struct address_space *mapping, gfp_t gfp_mask)

返回类型：gfp_t

参数：

类型	参数	名称
struct address_space *	mapping
gfp_t	gfp_mask

109

返回:mapping_gfp_mask(mapping)按位与gfp_mask

**调用者**
名称	描述
generic_file_buffered_read	generic_file_buffered_read - generic file read routine@iocb: the iocb to read@iter: data destination@written: already copied This is a generic file read routine, and uses the* mapping->a_ops->readpage() function for the actual low-level stuff.
page_symlink
grow_dev_page	Create the page-cache page that contains the requested block.* This is used purely for blockdev mappings.
do_mpage_readpage	This is the worker routine which does all the work of mapping the disk* blocks and constructs largest possible bios, submits them for IO if the* blocks are not contiguous on the disk
iomap_readpage_actor

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码