[PATCH -next v5 0/3] minor improvements for x86 mce processing

[Tong Tiangen <tongtiangen@huawei.com>]

In this patchset, we remove the unused macro EX_TYPE_COPY and centralize
the processing of memory-failure to do_machine_check() to avoid calling
memory_failure_queue() separately for different MC-Safe scenarios. In
addition, MCE_IN_KERNEL_COPYIN is renamed MCE_IN_KERNEL_COPY_MC to expand
its usage scope.

[1]https://lore.kernel.org/linux-mm/20230526063242.133656-1-wangkefeng.wang@huawei.com/

since v4:
  1. Patch1, suggested by Petkov, changes as follows:
    a.Improve the commit msg.
    b.Directly delete the unused fixup_type EX_TYPE_COPY instead of
      disrupting the overall layout.
  2. Patch2/3, improve the commit msg suggested by Petkov.
  3. To better describe the problem, reorder the patch 2/3.

since v3:
  1. Rebased on linux-next tag next-20240111.
  2. Delete duplicate commit references on patch 3.

since v2:
  1. remove redundant fixup type EX_TYPE_COPY.
  2. rename MCE_IN_KERNEL_COPYIN to MCE_IN_KERNEL_COPY_MC.
  3. update patch3's commit message and the processing logic of
     EX_TYPE_DEFAULT_MCE_SAFE based on the discussion of [1].

Kefeng Wang (1):
  x86/mce: set MCE_IN_KERNEL_COPYIN for DEFAULT_MCE_SAFE exception

Tong Tiangen (2):
  x86/mce: remove redundant fixup type EX_TYPE_COPY
  x86/mce: rename MCE_IN_KERNEL_COPYIN to MCE_IN_KERNEL_COPY_MC

 arch/x86/include/asm/asm.h                 |  3 ---
 arch/x86/include/asm/extable_fixup_types.h |  2 +-
 arch/x86/include/asm/mce.h                 |  8 ++++----
 arch/x86/kernel/cpu/mce/core.c             |  2 +-
 arch/x86/kernel/cpu/mce/severity.c         |  7 +++----
 arch/x86/mm/extable.c                      |  9 ---------
 mm/ksm.c                                   |  1 -
 mm/memory.c                                | 13 ++++---------
 8 files changed, 13 insertions(+), 32 deletions(-)

-- 
2.25.1