[PATCH 00/13] prep for device-dax, untangle pfn-device setup

Dan Williams
2016-03-24T01:26:02Z

The infrastructure for setting up a pfn-device (struct page memmap array
allocation for reserved memory) is generally useful. Untangle it from
the pmem driver and make it available as core libnvdimm functionality.
The motivation for this work is an investigation into a standalone
device-dax facility, but the changes stand on their own.

Outside of exporting nvdimm_setup_pfn() as a generic facility this also
includes the following benefits:

1/ fix a section alignment vs badblocks tracking bug

2/ struct pmem_device sheds 24 bytes

3/ struct blk_device is replaced with some (smaller in total) extensions
to struct nd_namespace_blk.

4/ Reduce pointer chasing by retrieving driver private data from
->queuedata rather than bio->bi_bdev->bd_disk->private_data.

---

Dan Williams (13):
libnvdimm, pfn: fix nvdimm_namespace_add_poison() vs section alignment
libnvdimm, pmem: kill pmem->ndns
libnvdimm, pfn, convert nd_pfn_probe() to devm
libnvdimm, btt, convert nd_btt_probe() to devm
libnvdimm, blk: use devm_add_action to release bdev resources
libnvdimm, blk: use ->queuedata for driver private data
libnvdimm, pmem: use ->queuedata for driver private data
libnvdimm, blk: move i/o infrastructure to nd_namespace_blk
libnvdimm, pmem: use devm_add_action to release bdev resources
libnvdimm, pmem: clean up resource print / request
libnvdimm, pmem, pfn: make pmem_rw_bytes generic and refactor pfn setup
libnvdimm, pmem, pfn: move pfn setup to the core
libnvdimm, pmem: kill ->pmem_queue and ->pmem_disk

drivers/nvdimm/blk.c | 208 ++++++++--------
drivers/nvdimm/btt.c | 20 +-
drivers/nvdimm/btt_devs.c | 24 +-
drivers/nvdimm/claim.c | 61 +++++
drivers/nvdimm/core.c | 41 ++-
drivers/nvdimm/nd.h | 50 +++-
drivers/nvdimm/pfn_devs.c | 208 +++++++++++++++-
drivers/nvdimm/pmem.c | 475 +++++++++----------------------------
include/linux/nd.h | 11 +
tools/testing/nvdimm/Kbuild | 1
tools/testing/nvdimm/test/iomap.c | 27 ++
11 files changed, 579 insertions(+), 547 deletions(-)