This is the body of OS_MCA_handler.

- init
    mca_external_handler_init
      init_record_index_pools
        kmalloc

- exit
    mca_external_handler_exit
      kfree

- handler
    mca_try_to_recover
      mca_make_slidx : pick up pointers in SAL log record
      mca_make_peidx : pick up pointers in Processor section
      is_mca_global : treat only local MCA
        recover_from_processor_error : treat only external bus error
          recover_from_platform_error  : treat only read error
            recover_from_read_error : set new restarting address

- handler_bh
    mca_handler_bhhook
      mca_handler_bh
        mca_page_isolate
        force_sig(SIGKILL, current)

The MCA offending process will restart from handler_bh, and
will suicide after isolating the poisoned page.

Thanks,
H.Seto

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>