[dm-devel] [PATCH v6 0/2] dax, dm: stop requiring dax for device-mapper

[Dan Williams]

Changes since v5 [1]:
* Make DAX_DRIVER select DAX to simplify the Kconfig dependencies
  (Michael)
* Rebase on 4.15-rc1 and add new IS_ENABLED(CONFIG_DAX_DRIVER) checks in
  drivers/md/dm-log-writes.c.

[1]: https://lists.01.org/pipermail/linux-nvdimm/2017-September/012569.html

---

Hi Mike,

Bart points out that the DAX core is unconditionally enabled if
device-mapper is enabled. Add some config machinery and some
stub/static-inline routines to allow dax infrastructure to be deleted
from device-mapper at compile time.

---

Dan Williams (2):
      dax: introduce CONFIG_DAX_DRIVER
      dm: allow device-mapper to operate without dax support


 arch/powerpc/platforms/Kconfig |    2 -
 drivers/dax/Kconfig            |    5 ++
 drivers/md/Kconfig             |    1 
 drivers/md/dm-linear.c         |    6 +++
 drivers/md/dm-log-writes.c     |   95 +++++++++++++++++++++-------------------
 drivers/md/dm-stripe.c         |    6 +++
 drivers/md/dm.c                |   10 +++-
 drivers/nvdimm/Kconfig         |    2 -
 drivers/s390/block/Kconfig     |    2 -
 include/linux/dax.h            |   30 ++++++++++---
 10 files changed, 99 insertions(+), 60 deletions(-)