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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-09 20:23:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-09 20:23:19 -0800
commitc30110608cfba7efff3a5e71914aee7c816115c5 (patch)
treebd7fca47f16826fb4521e16ada1c25971fa42ff2
parent9c37f95936b6c169e89733747504879b06e77c24 (diff)
parentd360b78f99e5d1724279644c8eb51d5cf0de4027 (diff)
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar: "These are the main changes in this cycle: - Streamline RCU's use of per-CPU variables, shifting from "cpu" arguments to functions to "this_"-style per-CPU variable accessors. - signal-handling RCU updates. - real-time updates. - torture-test updates. - miscellaneous fixes. - documentation updates" * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (34 commits) rcu: Fix FIXME in rcu_tasks_kthread() rcu: More info about potential deadlocks with rcu_read_unlock() rcu: Optimize cond_resched_rcu_qs() rcu: Add sparse check for RCU_INIT_POINTER() documentation: memory-barriers.txt: Correct example for reorderings documentation: Add atomic_long_t to atomic_ops.txt documentation: Additional restriction for control dependencies documentation: Document RCU self test boot params rcutorture: Fix rcu_torture_cbflood() memory leak rcutorture: Remove obsolete kversion param in kvm.sh rcutorture: Remove stale test configurations rcutorture: Enable RCU self test in configs rcutorture: Add early boot self tests torture: Run Linux-kernel binary out of results directory cpu: Avoid puts_pending overflow rcu: Remove "cpu" argument to rcu_cleanup_after_idle() rcu: Remove "cpu" argument to rcu_prepare_for_idle() rcu: Remove "cpu" argument to rcu_needs_cpu() rcu: Remove "cpu" argument to rcu_note_context_switch() rcu: Remove "cpu" argument to rcu_preempt_check_callbacks() ...
-rw-r--r--Documentation/RCU/rcu.txt4
-rw-r--r--Documentation/RCU/stallwarn.txt14
-rw-r--r--Documentation/RCU/trace.txt4
-rw-r--r--Documentation/RCU/whatisRCU.txt2
-rw-r--r--Documentation/atomic_ops.txt12
-rw-r--r--Documentation/kernel-parameters.txt16
-rw-r--r--Documentation/memory-barriers.txt40
-rw-r--r--include/linux/init_task.h2
-rw-r--r--include/linux/rcupdate.h19
-rw-r--r--include/linux/rcutiny.h2
-rw-r--r--include/linux/rcutree.h6
-rw-r--r--include/linux/sched.h4
-rw-r--r--include/trace/events/rcu.h4
-rw-r--r--init/Kconfig49
-rw-r--r--kernel/cpu.c19
-rw-r--r--kernel/fork.c5
-rw-r--r--kernel/rcu/Makefile2
-rw-r--r--kernel/rcu/rcu.h2
-rw-r--r--kernel/rcu/rcutorture.c1
-rw-r--r--kernel/rcu/tiny.c6
-rw-r--r--kernel/rcu/tree.c97
-rw-r--r--kernel/rcu/tree.h22
-rw-r--r--kernel/rcu/tree_plugin.h111
-rw-r--r--kernel/rcu/update.c89
-rw-r--r--kernel/sched/core.c2
-rw-r--r--kernel/signal.c42
-rw-r--r--kernel/softirq.c2
-rw-r--r--kernel/time/tick-sched.c2
-rw-r--r--kernel/time/timer.c3
-rw-r--r--lib/Kconfig.debug14
-rwxr-xr-xtools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh6
-rwxr-xr-xtools/testing/selftests/rcutorture/bin/kvm.sh19
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-rw-r--r--tools/testing/selftests/rcutorture/configs/rcu/TREE051
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-rw-r--r--tools/testing/selftests/rcutorture/doc/TINY_RCU.txt2
-rw-r--r--tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt15
121 files changed, 408 insertions, 1858 deletions
diff --git a/Documentation/RCU/rcu.txt b/Documentation/RCU/rcu.txt
index bf778332a28f..745f429fda79 100644
--- a/Documentation/RCU/rcu.txt
+++ b/Documentation/RCU/rcu.txt
@@ -36,7 +36,7 @@ o How can the updater tell when a grace period has completed
executed in user mode, or executed in the idle loop, we can
safely free up that item.
- Preemptible variants of RCU (CONFIG_TREE_PREEMPT_RCU) get the
+ Preemptible variants of RCU (CONFIG_PREEMPT_RCU) get the
same effect, but require that the readers manipulate CPU-local
counters. These counters allow limited types of blocking within
RCU read-side critical sections. SRCU also uses CPU-local
@@ -81,7 +81,7 @@ o I hear that RCU is patented? What is with that?
o I hear that RCU needs work in order to support realtime kernels?
This work is largely completed. Realtime-friendly RCU can be
- enabled via the CONFIG_TREE_PREEMPT_RCU kernel configuration
+ enabled via the CONFIG_PREEMPT_RCU kernel configuration
parameter. However, work is in progress for enabling priority
boosting of preempted RCU read-side critical sections. This is
needed if you