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Subject[PATCH 0/4] HMM tests and minor fixes
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These changes are based on Jason's latest hmm branch.
Patch 1 was previously posted here [1] but was dropped from the orginal
series. Hopefully, the tests will reduce concerns about edge conditions.
I'm sure more tests could be usefully added but I thought this was a good
starting point.

[1] https://lore.kernel.org/linux-mm/20190726005650.2566-6-rcampbell@nvidia.com/

Ralph Campbell (4):
mm/hmm: make full use of walk_page_range()
mm/hmm: allow snapshot of the special zero page
mm/hmm: allow hmm_range_fault() of mmap(PROT_NONE)
mm/hmm/test: add self tests for HMM

MAINTAINERS | 3 +
drivers/char/Kconfig | 11 +
drivers/char/Makefile | 1 +
drivers/char/hmm_dmirror.c | 1504 ++++++++++++++++++++++++
include/Kbuild | 1 +
include/uapi/linux/hmm_dmirror.h | 74 ++
mm/hmm.c | 117 +-
tools/testing/selftests/vm/.gitignore | 1 +
tools/testing/selftests/vm/Makefile | 3 +
tools/testing/selftests/vm/config | 3 +
tools/testing/selftests/vm/hmm-tests.c | 1304 ++++++++++++++++++++
tools/testing/selftests/vm/run_vmtests | 16 +
tools/testing/selftests/vm/test_hmm.sh | 105 ++
13 files changed, 3079 insertions(+), 64 deletions(-)
create mode 100644 drivers/char/hmm_dmirror.c
create mode 100644 include/uapi/linux/hmm_dmirror.h
create mode 100644 tools/testing/selftests/vm/hmm-tests.c
create mode 100755 tools/testing/selftests/vm/test_hmm.sh

--
2.20.1

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