From: Andrea Parri (Microsoft) <parri.andrea@gmail.com>  Sent: Wednesday, June 17, 2020 9:47 AM

The spinlock is (now) *not used to protect test-and-set accesses
to attributes of the structure or sc_list operations.

There is, AFAICT, a distinct lack of {WRITE,READ}_ONCE()s in the
handling of channel->state, but the changes below do not seem to
make things "worse".  ;-)

Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
---
 drivers/hv/channel.c      | 6 +-----
 drivers/hv/channel_mgmt.c | 1 -
 include/linux/hyperv.h    | 6 ------
 3 files changed, 1 insertion(+), 12 deletions(-)

Reviewed-by: Michael Kelley <redacted>