linux-kernel - [PATCH tip/core/rcu 0/52] Remove rcu

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Date:   Wed, 29 Aug 2018 15:38:30 -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 0/52] Remove rcu_state pointers for v4.20/v5.0

Hello!

This commit does RCU-consolidation cleanups that get rid of pointers to
the sole remaining rcu_state structure:

1-40:	Remove the "rsp" parameter from numerous functions, given that
	the corresponding argument will always be &rcu_state.

41.	Remove rcu_data structure's ->rsp field, now that it always
	contains a pointer to rcu_state.

42.	Remove non-flavor-traversal rsp local variable from tree_plugin.h.

43.	Remove the for_each_rcu_flavor() flavor-traversal macro, given
	that there is now only ever one flavor to traverse.

44.	Simplify rcutorture_get_gp_data() based on there now being only
	one rcu_state structure.

45.	Restructure rcu_check_gp_kthread_starvation() based on there
	now being only one rcu_state structure.

46.	Restructure RCU CPU stall warnings based on there now being only
	one rcu_state structure.

47.	Restructure grace-period management code based on there now being
	only one rcu_state structure.

48.	Restructure callback registration/invocation code based on there
	now being only one rcu_state structure.

49.	Restructure quiescent-state and grace-period-nonstart code based
	on there now being only one rcu_state structure.

50.	Restructure rcu_barrier() based on there now being only one
	rcu_state structure.

51.	Restructure initialization code based on there now being only
	one rcu_state structure.

52.	Fix typo in force_qs_rnp()'s parameter's parameter, which was
	located by searching for "rsp".

							Thanx, Paul

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

 Documentation/RCU/Design/Data-Structures/Data-Structures.html |   23 
 kernel/rcu/rcu.h                                              |   28 
 kernel/rcu/srcutree.c                                         |    4 
 kernel/rcu/tree.c                                             | 1261 ++++------
 kernel/rcu/tree.h                                             |   29 
 kernel/rcu/tree_exp.h                                         |  209 -
 kernel/rcu/tree_plugin.h                                      |  203 -
 7 files changed, 784 insertions(+), 973 deletions(-)