[PATCH rcu/next 0/3] Preparatory patches borrowed from lazy rcu v5

["Joel Fernandes (Google)" <joel@joelfernandes.org>]

Hello,

Just sending a few patches before lazy rcu v6 can come out. That can come out
after more testing to check feasibility of ideas discussed at LPC. I will try
to get rcutop pushed as well before that, but in the meanwhile I don't see much
reason to block these few patches for 6.1. These apply to Paul's rcu/next
branch. What do you think?

For Resend:
- Added Reviewed-by tags from Frederic on 1/3 and 3/3. For 2/3, I implemented
changes after last discussion.
- Better commit messages.

Joel Fernandes (Google) (3):
rcu/tree: Use READ_ONCE() for lockless read of rnp->qsmask
rcu: Fix late wakeup when flush of bypass cblist happens (v6)
rcu: Call trace_rcu_callback() also for bypass queuing (v2)

kernel/rcu/tree.c      | 32 +++++++++++++++++++++++---------
kernel/rcu/tree_nocb.h | 10 ++++++++--
2 files changed, 31 insertions(+), 11 deletions(-)

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2.37.3.968.ga6b4b080e4-goog