Hello! This series provides additional polling interfaces for RCU, so that an updater may initiate and poll for completion of an RCU grace period despite never being invoked from a sleepable region of code. These are similar to the corresponding SRCU interfaces, give or take additional restrictions to avoid deadlock with the scheduler. 1. Provide polling interfaces for Tree RCU grace periods. 2. Provide polling interfaces for Tiny RCU grace periods. 3. Test start_poll_synchronize_rcu() and poll_state_synchronize_rcu(). Thanx, Paul ------------------------------------------------------------------------ include/linux/rcutiny.h | 11 ++++--- include/linux/rcutree.h | 2 + kernel/rcu/rcutorture.c | 12 ++------ kernel/rcu/tiny.c | 40 +++++++++++++++++++++++++++ kernel/rcu/tree.c | 70 ++++++++++++++++++++++++++++++++++++++++++++---- 5 files changed, 116 insertions(+), 19 deletions(-)
