x86, mce: machine check recovery for applications

Yet another version ...

Some bits should look familiar (hopefully pieces that were not too controversial from earlier versions). Other bits are all new (e.g. part 4/6 which sets up some functions that can safely save away the physical address of the faulting address in the machine check handler for later retrieval in a safer execution context).

Tony Luck (6):
HWPOISON: clean up memory_failure() vs. __memory_failure()
HWPOISON: Add code to handle "action required" errors. x86, mce: create helper function to save addr/misc when needed x86, mce: Add mechanism to safely save information in MCE handler x86, mce: handle "action required" errors
x86, mce: Recognise machine check bank signature for data path error

 arch/x86/kernel/cpu/mcheck/mce-severity.c |   14 +++-
 arch/x86/kernel/cpu/mcheck/mce.c          |  153 ++++++++++++++++++++++-------
 drivers/base/memory.c                     |    2 +-
 include/linux/mm.h                        |    4 +-
 mm/hwpoison-inject.c                      |    4 +-
 mm/madvise.c                              |    2 +-
 mm/memory-failure.c                       |   96 ++++++++++---------
 7 files changed, 186 insertions(+), 89 deletions(-)

1.7.3.1