Hello!
This series contains miscellaneous fixes for 3.20:
1. Make rcu_nmi_enter() handle nesting, as there are now some
architectures that use RCU read-side critical sections in
NMI-like constructs that can nest in one another. Algorithm
courtesy of Andy Lutomirski.
2. Remove redundant rcu_is_cpu_rrupt_from_idle() from tiny RCU,
courtesy of Alexander Gordeev.
3. Fix invoke_rcu_callbacks() comment to correctly reflect
required calling environment.
4. Allow 1- and 2-byte smp_load_acquire() and smp_store_release(),
given that the C11 standard requires that compilers support this.
5. Replace smp_read_barrier_depends() with lockless_dereference(),
courtesy of Pranith Kumar.
6. Directly force QS when call_rcu_[bh|sched]() on idle_task for
tiny RCU, courtesy of Lai Jiangshan. Saves more than 1KB.
7. Fix sparse warning from hlist_for_each_entry_continue_rcu_bh(),
courtesy of Ying Xue.
8. Fix hang in CPU hotplug code, courtesy of David Hildenbrand.
9. Fix rcu_barrier() race that could result in too-short wait.
10. Remove obsolete "select IRQ_WORK" from config TREE_RCU, courtesy
of Lai Jiangshan.
Thanx, Paul
------------------------------------------------------------------------
b/include/linux/compiler.h | 2
b/include/linux/rculist.h | 16 +++---
b/include/linux/rcupdate.h | 10 ++--
b/init/Kconfig | 2
b/kernel/cpu.c | 56 +++++++++-------------
b/kernel/rcu/rcu.h | 6 ++
b/kernel/rcu/tiny.c | 111 +++------------------------------------------
b/kernel/rcu/tiny_plugin.h | 2
b/kernel/rcu/tree.c | 75 ++++++++++++++++++++----------
b/kernel/rcu/tree.h | 30 ++----------
b/kernel/rcu/tree_plugin.h | 45 +++++++++++-------
11 files changed, 138 insertions(+), 217 deletions(-)
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