[PATCH tip/core/rcu 0/52] Remove rcu_state pointers for v4.20/v5.0

From: Paul E. McKenney
Date: Wed Aug 29 2018 - 18:38:39 EST


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(-)