Hello! This series adds support for full-state polled RCU grace periods, both normal and expedited: 1. Add full-sized polling for get_completed*() and poll_state*(). 2. Add full-sized polling for get_state(). 3. Abstract synchronous and polled API testing. 4. Allow per-RCU-flavor polled double-GP check. 5. Verify RCU reader prevents full polling from completing. 6. Remove redundant RTWS_DEF_FREE check. 7. Verify long-running reader prevents full polling from completing. 8. Add full-sized polling for start_poll(). 9. Add full-sized polling for start_poll_expedited(). 10. Remove blank line from poll_state_synchronize_rcu() docbook header. 11. Add full-sized polling for cond_sync_full(). 12. Add full-sized polling for cond_sync_exp_full(). 13. Disable run-time single-CPU grace-period optimization. 14. Set rcu_data structures' initial ->gpwrap value to true. 15. rcu-tasks: Remove grace-period fast-path rcu-tasks helper. 16. Make synchronize_rcu() fast path update ->gp_seq counters. 17. Remove expedited grace-period fast-path forward-progress helper. 18. Make synchronize_rcu_expedited() fast path update .expedited_sequence. 19. Remove ->rgos_polled field from rcu_gp_oldstate structure. 20. Adjust rcu_poll_need_2gp() for rcu_gp_oldstate field removal. 21. Make synchronize_rcu() fastpath update only boot-CPU counters. 22. Use 1-suffixed variable in rcu_torture_write_types() check. 23. Expand rcu_torture_write_types() first "if" statement. 24. Add functions to compare grace-period state values. 25. Limit read-side polling-API testing. Thanx, Paul ------------------------------------------------------------------------ b/include/linux/rcupdate.h | 3 b/include/linux/rcutiny.h | 9 b/include/linux/rcutree.h | 8 b/kernel/rcu/rcutorture.c | 9 b/kernel/rcu/tiny.c | 10 + b/kernel/rcu/tree.c | 76 +++++++- b/kernel/rcu/tree_exp.h | 18 + include/linux/rcupdate.h | 21 ++ include/linux/rcutiny.h | 41 ++++ include/linux/rcutree.h | 34 +++ kernel/rcu/rcutorture.c | 412 +++++++++++++++++++++++++++++++++------------ kernel/rcu/tree.c | 230 +++++++++++++++++-------- kernel/rcu/tree_exp.h | 35 +++ 13 files changed, 720 insertions(+), 186 deletions(-)
