[PATCH v5 0/8] dax/pmem: Provide a dax operation to zero range of memory

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Hi, 

This is V5 of patches. These patches are also available at.

https://github.com/rhvgoyal/linux/commits/dax-zero-range-v5

Changes since V4:

- Rebased on top of 5.6-rc2
- Added a separate patch so that pmem_clear_poison() accepts arbitrary
  offset and len and aligns these as needed. This takes away the burden
  of aligning from callers.

Previous versions of patches are here.
v4:
https://lore.kernel.org/linux-fsdevel/20200217181653.4706-1-vgoyal@xxxxxxxxxx/
v3:
https://lore.kernel.org/linux-fsdevel/20200214125717.GA18654@xxxxxxxxxx/T/#t
v2:
https://lore.kernel.org/linux-fsdevel/20200203200029.4592-1-vgoyal@xxxxxxxxxx/
v1:
https://lore.kernel.org/linux-fsdevel/20200123165249.GA7664@xxxxxxxxxx/

Thanks
Vivek

Vivek Goyal (8):
  pmem: Add functions for reading/writing page to/from pmem
  drivers/pmem: Allow pmem_clear_poison() to accept arbitrary offset and
    len
  pmem: Enable pmem_do_write() to deal with arbitrary ranges
  dax, pmem: Add a dax operation zero_page_range
  s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
  dm,dax: Add dax zero_page_range operation
  dax,iomap: Start using dax native zero_page_range()
  dax,iomap: Add helper dax_iomap_zero() to zero a range

 drivers/dax/super.c           |  19 +++++
 drivers/md/dm-linear.c        |  21 ++++++
 drivers/md/dm-log-writes.c    |  19 +++++
 drivers/md/dm-stripe.c        |  26 +++++++
 drivers/md/dm.c               |  31 ++++++++
 drivers/nvdimm/pmem.c         | 134 +++++++++++++++++++++++-----------
 drivers/s390/block/dcssblk.c  |  17 +++++
 fs/dax.c                      |  53 ++++----------
 fs/iomap/buffered-io.c        |   9 +--
 include/linux/dax.h           |  20 ++---
 include/linux/device-mapper.h |   3 +
 11 files changed, 246 insertions(+), 106 deletions(-)

-- 
2.20.1

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