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Subject[PATCH RFC 0/6] Miscellaneous RCU fixes for 3.5
Hello!

This series includes several miscellaneous fixes for RCU as follows:

1. Make the rcu_blocking_is_gp() function properly guard against
concurrent CPU-hotplug operations.
2. Make __list_add_rcu() do pointer checks like __list_add() does,
courtesy of Dave Jones.
3. Replace the "unsafe at any speed" list_first_entry_rcu() macro
with a safe and sane list_first_or_null_rcu(), courtesy of
Michel Machado.
4. Clarify help text for the RCU_BOOST_PRIO kernel config parameter.
5. Convert __kfree_rcu() from an inline function to a macro in order
to avoid spurious build failures should gcc fail to inline it.
Courtesy of Jan Engelhardt.
6. Reduce cache-miss initialization latencies for large systems.
Given the widespread use of NR_CPUS=4096, there are a lot of
large systems out there.

Thanx, Paul


b/include/linux/rculist.h | 7 ++++++-
b/include/linux/rcupdate.h | 18 ++++++++++++++++++
b/include/linux/rcutree.h | 7 ++++++-
b/init/Kconfig | 23 +++++++++++++++++++----
b/kernel/rcutree.c | 2 +-
b/kernel/rcutree.h | 10 +++-------
b/lib/list_debug.c | 22 ++++++++++++++++++++++
include/linux/rculist.h | 33 +++++++++++++++++++++++++++++----
init/Kconfig | 27 +++++++++++++++++++++++++++
9 files changed, 131 insertions(+), 18 deletions(-)



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