The first version of this patch is a part of mmc non-blocking v9 patchset:
[PATCH v9 11/12] mmc: core: add random fault injection

change log:
 v2 - Resolve build issue in mmc core.c due to multiple init_module by
      removing the fault inject module.
    - Export fault injection functions to make them available for modules
    - Update fault injection documentation on MMC IO  

Per Forlin (3):
  fault-inject: make fault injection available for modules
  mmc: core: add random fault injection
  fault injection: add documentation on MMC IO fault injection

 Documentation/fault-injection/fault-injection.txt |    5 ++
 drivers/mmc/core/core.c                           |   58 +++++++++++++++++++++
 drivers/mmc/core/debugfs.c                        |    5 ++
 include/linux/mmc/host.h                          |    3 +
 lib/Kconfig.debug                                 |   11 ++++
 lib/fault-inject.c                                |    2 +
 6 files changed, 84 insertions(+), 0 deletions(-)

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1.7.4.1