fsfreeze: from uninterruptible to killable

Hi,

I rebased the work on top of -next and I applied a Jan's comment about __sb_start_write. I did some basic tests and they are ok.

Open points:
- without change mnt_want_write several paths are still blocking paths;
- page_mkwrite still call blocking variant of __sb_start_write.

Any comments are welcome.

Regards.

Marco Stornelli (3):
fsfreeze: wait in killable state in __sb_start_write
fsfreeze: added new file_start_write_killable
fsfreeze: use sb_start_write_killable instead of sb_start_write

 drivers/block/loop.c |    4 +++-
 fs/aio.c             |    7 +++++--
 fs/coda/file.c       |    4 +++-
 fs/open.c            |    8 ++++++--
 fs/read_write.c      |   28 +++++++++++++++++-----------
 fs/splice.c          |    4 +++-
 fs/super.c           |   24 ++++++++++++++++++------
 include/linux/fs.h   |   36 ++++++++++++++++++++++++++++++------
 8 files changed, 85 insertions(+), 30 deletions(-)

1.7.3.4
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