mm/hugetlb: add hugetlb_folio_subpool() helpers

Allow hugetlbfs_migrate_folio to check and read subpool information by
passing in a folio.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Sidhartha Kumar <[email protected]>
Reviewed-by: Mike Kravetz <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Colin Cross <[email protected]>
Cc: David Howells <[email protected]>
Cc: "Eric W . Biederman" <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: kernel test robot <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: William Kucharski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions