[PATCH 0/3] Make pfn_t suitable for placing in the radix tree

From: Matthew Wilcox
Date: Fri Mar 11 2016 - 16:13:20 EST

I did some experimenting with converting the DAX radix tree from storing
sector numbers to storing pfn_t. While we're not ready to do that
conversion yet, these pieces make sense to at least get reviewed now,
and maybe get upstream.

I think the first patch is worthwhile all by itself as a stepping stone to
making SG lists contain PFNs instead of pages.

Matthew Wilcox (3):
pfn_t: Change the encoding
pfn_t: Support for huge PFNs
pfn_t: New functions pfn_t_add and pfn_t_cmp

include/linux/pfn_t.h | 72 +++++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 61 insertions(+), 11 deletions(-)