Recent testing uncovered two bugs around the handling of section-misaligned
pmem regions:
1/ If the pmem section overlaps "System RAM" we need to fail the
devm_memremap_pages() request. Previously we would mis-detect a
memory map like the following:
100000000-37bffffff : System RAM
37c000000-837ffffff : Persistent Memory
2/ If the pmem section is misaligned, but otherwise does not overlap
memory from another zone, the altmap needs to be fixed up to add the
alignment padding to the 'reserved ' pfns of the altmap.
---
Dan Williams (2):
libnvdimm, pmem: fix 'pfn' support for section-misaligned namespaces
mm: fix mixed zone detection in devm_memremap_pages
drivers/nvdimm/pmem.c | 29 +++++++++++++++++++++++++++--
kernel/memremap.c | 9 ++++-----
2 files changed, 31 insertions(+), 7 deletions(-)
