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Subject[PATCH v4 0/2] mm,hwpoison: fix sending SIGBUS for Action Required MCE

I updated the series based on Boris's review. I folded 2/3 and 3/3
into one patch, updated description, added some refactored and rebased
onto v5.12. There's no essential change in how the problem is solved.

v2 (only 3/3 is posted):

Naoya Horiguchi

--- quote from cover letter of v1 ---

I wrote this patchset to materialize what I think is the current
allowable solution mentioned by the previous discussion [1].
I simply borrowed Tony's mutex patch and Aili's return code patch,
then I queued another one to find error virtual address in the best
effort manner. I know that this is not a perfect solution, but
should work for some typical case.


Naoya Horiguchi (1):
mm,hwpoison: send SIGBUS when the page has already been poisoned

Tony Luck (1):
mm/memory-failure: Use a mutex to avoid memory_failure() races

arch/x86/kernel/cpu/mce/core.c | 13 ++-
include/linux/swapops.h | 5 ++
mm/memory-failure.c | 180 +++++++++++++++++++++++++++++++++++++----
3 files changed, 182 insertions(+), 16 deletions(-)

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