Return the requested group of flags for the pageblock_nr_pages block of pages
unsigned long get_pfnblock_flags_mask(struct page * page, unsigned long pfn, unsigned long end_bitidx, unsigned long mask);
page
The page within the block of interest
pfn
The target page frame number
end_bitidx
The last bit of interest to retrieve
mask
mask of bits that the caller is interested in
pageblock_bits flags