[PULLREQUEST] md bugfix for 3.1

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Hi Linus,
please pull this one patch which fixes a race in md thread wakeup at the
same time as shutdown. This is also a case where it isn't a race but a
definite "will try to wake up a non-existent thread" when trying to start
RAID10 that doesn't have enough working disks.

This is tagged for -stable.

Thanks,
NeilBrown


The following changes since commit 976d167615b64e14bc1491ca51d424e2ba9a5e84:

Linux 3.1-rc9 (2011-10-04 18:11:50 -0700)

are available in the git repository at:
git://neil.brown.name/md/ for-linus

last commit being 01f96c0a9922cd9919baf9d16febdf7016177a12

NeilBrown (1):
md: Avoid waking up a thread after it has been freed.

drivers/md/md.c | 22 +++++++++++++++++++---
drivers/md/md.h | 2 +-
drivers/md/multipath.c | 3 +--
drivers/md/raid1.c | 3 +--
drivers/md/raid10.c | 5 ++---
drivers/md/raid5.c | 6 ++----
6 files changed, 26 insertions(+), 15 deletions(-)

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