NVMe fix for 4.7

Hi Linus,

Late addition here, it's basically a revert of a patch that was added in this merge window, but has proven to cause problems. This is swapping out the RCU based namespace protection with a good old mutex instead. Does not cause merge conflicts with my 4.8 branch, so should not give us any issues there either.

Please pull!

git://git.kernel.dk/linux-block.git for-linus

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Keith Busch (1):
nvme: Remove RCU namespace protection

 drivers/nvme/host/core.c | 74 +++++++++++++++++++++++++-----------------------
 1 file changed, 39 insertions(+), 35 deletions(-)

Jens Axboe