Messages in this thread | | | Date | Tue, 28 Oct 2014 15:09:44 -0700 | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 0/9] Miscellaneous fixes for 3.19 |
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Hello!
This series provides miscellaneous fixes:
1. Removes the CONFIG_RCU_CPU_STALL_VERBOSE, so that RCU CPU stall warnings are henceforth unconditionally verbose. (Another RCU Kconfig variable bites the dust!)
2. Allow 1- and 2-byte smp_load_acquire() and smp_store_release(). This has the side effect of removing support for pre-EV56 Alpha CPUs, and the official Alpha maintainers have thus far been silent on this issue.
3. Use rcu_dereference() for accessing struct mapped_device, courtesy of Pranith Kumar.
4. Annotate the dm_table's ->map field with __rcu, courtesy of Pranith Kumar.
5. Add sparse checking for use of RCU_INIT_POINTER() on a non-__rcu pointer, courtesy of Pranith Kumar.
6. Prevent cond_resched_rcu_qs() from doing gratuitous call to rcu_note_voluntary_context_switch().
7. Update the list of rcu_read_unlock() potential deadlocks, courtesy of Oleg Nesterov.
8. Bind rcu_tasks_kthread() to housekeeping CPUs in CONFIG_NO_HZ_FULL builds.
9. Provide lockless_dereference() for times when you want rcu_dereference(), but without the sparse and lockdep-RCU noise.
Thanx, Paul
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b/Documentation/RCU/stallwarn.txt | 6 -- b/drivers/md/dm.c | 10 ++-- b/include/linux/compiler.h | 2 b/include/linux/rcupdate.h | 24 ++++++++-- b/kernel/rcu/tree_plugin.h | 13 ----- b/kernel/rcu/update.c | 3 - b/lib/Kconfig.debug | 12 ----- b/tools/testing/selftests/rcutorture/configs/rcu/TREE01 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE02 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE02-T | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE03 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE04 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE05 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE06 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE07 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE08 | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE08-T | 1 b/tools/testing/selftests/rcutorture/configs/rcu/TREE09 | 1 b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt | 3 - 19 files changed, 30 insertions(+), 54 deletions(-)
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