Read into page cache, using specified page allocation flags.
struct page * read_cache_page_gfp(struct address_space * mapping, pgoff_t index, gfp_t gfp);
mapping
the page's address_space
index
the page index
gfp
the page allocator flags to use if allocating
This is the same as “read_mapping_page(mapping, index, NULL)”, but with any new page allocations done using the specified allocation flags.
If the page does not get brought uptodate, return -EIO.