mapping_gfp_constraint

Name:Restricts the given gfp_mask to what the mapping allows.

Proto:static inline gfp_t mapping_gfp_constraint(struct address_space *mapping, gfp_t gfp_mask)

Type:gfp_t

Parameter:

Type	Parameter	Name
struct address_space *	mapping
gfp_t	gfp_mask

109

Return mapping_gfp_mask(mapping) & gfp_mask

**Caller**
Name	Describe
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

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