Hello! This series contains preemptible-RCU updates for v5.6: 1. Fix dump_tree hierarchy print always active, courtesy of Stefan Reiter. 2. Avoid data-race in rcu_gp_fqs_check_wake(), courtesy of Eric Dumazet. 3. Use lockdep rather than comment to enforce lock held. 4. Make PREEMPT_RCU be a modifier to TREE_RCU, courtesy of Lai Jiangshan. 5. Use CONFIG_PREEMPTION where appropriate, courtesy of Sebastian Andrzej Siewior. 6. Rename some instances of CONFIG_PREEMPTION to CONFIG_PREEMPT_RCU, courtesy of Lai Jiangshan. 7. Clear .exp_hint only when deferred quiescent state has been reported, courtesy of Lai Jiangshan. 8. Clear ->rcu_read_unlock_special only once, courtesy of Lai Jiangshan. 9. Use READ_ONCE() for ->expmask in rcu_read_unlock_special(). 10. Provide wrappers for uses of ->rcu_read_lock_nesting, courtesy of Lai Jiangshan. 11. Avoid tick_dep_set_cpu() misordering. Thanx, Paul ------------------------------------------------------------------------ include/linux/rcupdate.h | 8 +-- include/trace/events/rcu.h | 4 - kernel/rcu/Kconfig | 17 +++--- kernel/rcu/Makefile | 1 kernel/rcu/rcu.h | 2 kernel/rcu/rcutorture.c | 2 kernel/rcu/srcutiny.c | 2 kernel/rcu/tree.c | 20 ++++--- kernel/rcu/tree_exp.h | 6 +- kernel/rcu/tree_plugin.h | 118 +++++++++++++++++++++++++-------------------- kernel/rcu/tree_stall.h | 6 +- kernel/rcu/update.c | 2 kernel/sysctl.c | 2 13 files changed, 105 insertions(+), 85 deletions(-)
