The page fault part of fsdax code is little complex. In order to add CoW
feature and make it easy to understand, I was suggested to factor some
helper functions to simplify the current dax code.

This is separated from the previous patchset called "V3 fsdax,xfs: Add
reflink&dedupe support for fsdax", and the previous comments are here[1].


Changes from V1:
 - fix Ritesh's email address
 - simplify return logic in  dax_fault_cow_page()

(Rebased on v5.12-rc5)

Shiyang Ruan (3):
  fsdax: Factor helpers to simplify dax fault code
  fsdax: Factor helper: dax_fault_actor()
  fsdax: Output address in dax_iomap_pfn() and rename it

 fs/dax.c | 439 +++++++++++++++++++++++++++++--------------------------
 1 file changed, 232 insertions(+), 207 deletions(-)


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