linux-kernel - [PATCH tip/core/rcu 0/10] Dyntick changes for v4.20/v5.0

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Date:   Wed, 29 Aug 2018 16:07:15 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org
Subject: [PATCH tip/core/rcu 0/10] Dyntick changes for v4.20/v5.0

Hello!

Now that there is only one rcu_data structure per CPU, there isn't a whole
lot of point in maintaining a separate per-CPU rcu_dynticks structure.
This series therefore merges the rcu_dynticks structure into the rcu_data
structure.

1.	Remove unused rcu_dynticks_snap() from Tiny RCU.

2.	Merge rcu_dynticks structure into rcu_data structure, but
	continue using the rcu_dynticks structure's fields.

3-8.	Change the code to use the fields in the rcu_data structure
	instead of those in the rcu_dynticks structure.

9.	Remove the now-obsolete ->dynticks_fqs and ->cond_resched_completed
	fields from the rcu_data structure.

10.	Convert rcu_state.ofl_lock to raw_spinlock_t to make -rt feel
	better, courtesy of Mike Galbraith.

							Thanx, Paul

------------------------------------------------------------------------

 include/linux/rcutiny.h  |    6 -
 kernel/rcu/tree.c        |  196 ++++++++++++++++++++++-------------------------
 kernel/rcu/tree.h        |   82 +++++++------------
 kernel/rcu/tree_exp.h    |    8 -
 kernel/rcu/tree_plugin.h |   69 +++++++---------
 5 files changed, 163 insertions(+), 198 deletions(-)