mm: Add folio_raw_mapping()

Convert __page_rmapping to folio_raw_mapping and move it to mm/internal.h.
It's only a couple of instructions (load and mask), so it's definitely
going to be cheaper to inline it than call it.  Leave page_rmapping
out of line.  Change page_anon_vma() to not call folio_raw_mapping() --
it's more efficient to do the subtraction than the mask.

Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Reviewed-by: David Howells <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>

0 files changed, 0 insertions, 0 deletions