Man page 9 : read_cache_page_gfp

read_cache_page_gfp - 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 pageAqs 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.