find_or_create

函数名称：d_or_create_page - locate or add a pagecache page*@mapping: the page's address_space*@index: the page's index into the mapping*@gfp_mask: page allocation mode* Looks up the page cache slot at @mapping & @offset

函数原型：static inline struct page *find_or_create_page(struct address_space *mapping, unsigned long offset, gfp_t gfp_mask)

返回类型：struct page

参数：

类型	参数	名称
struct address_space *	mapping
unsigned long	offset
gfp_t	gfp_mask

**调用者**
名称	描述
grow_dev_page	Create the page-cache page that contains the requested block.* This is used purely for blockdev mappings.
aio_setup_ring
grab_cache_page	Returns locked page at given index in given cache, creating it if needed.

函数逻辑报告