wireguard-linux/kernel/rcu/Kconfig, branch jd/unified-crypt-queue

rcu: Use CONFIG_PREEMPTION where appropriate

2019-12-09T20:37:51Z

The config option `CONFIG_PREEMPT' is used for the preemption model "Low-Latency Desktop". The config option `CONFIG_PREEMPTION' is enabled when kernel preemption is enabled which is true for the preemption model `CONFIG_PREEMPT' and `CONFIG_PREEMPT_RT'. Use `CONFIG_PREEMPTION' if it applies to both preemption models and not just to `CONFIG_PREEMPT'. Cc: "Paul E. McKenney" Cc: Josh Triplett Cc: Steven Rostedt Cc: Mathieu Desnoyers Cc: Lai Jiangshan Cc: Joel Fernandes Cc: Davidlohr Bueso Cc: rcu@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Paul E. McKenney

rcu: Make PREEMPT_RCU be a modifier to TREE_RCU

2019-12-09T20:37:51Z

Currently PREEMPT_RCU and TREE_RCU are mutually exclusive Kconfig options. But PREEMPT_RCU actually specifies a kind of TREE_RCU, namely a preemptible TREE_RCU. This commit therefore makes PREEMPT_RCU be a modifer to the TREE_RCU Kconfig option. This has the benefit of simplifying several of the #if expressions that formerly needed to check both, but now need only check one or the other. Signed-off-by: Lai Jiangshan Signed-off-by: Lai Jiangshan Reviewed-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney

rcu: Use CONFIG_PREEMPTION

2019-07-31T17:03:35Z

CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same functionality which today depends on CONFIG_PREEMPT. Switch the conditionals in RCU to use CONFIG_PREEMPTION. That's the first step towards RCU on RT. The further tweaks are work in progress. This neither touches the selftest bits which need a closer look by Paul. Signed-off-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Masami Hiramatsu Cc: Paolo Bonzini Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20190726212124.210156346@linutronix.de Signed-off-by: Ingo Molnar

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46Z

Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

time: Move CONTEXT_TRACKING to kernel/time/Kconfig

2019-01-15T10:16:41Z

Both CONTEXT_TRACKING and CONTEXT_TRACKING_FORCE are currently defined in kernel/rcu/kconfig, which might have made sense at some point, but no longer does given that RCU refers to neither of these Kconfig options. Therefore move them to kernel/time/Kconfig, where the rest of the NO_HZ_FULL Kconfig options live. Signed-off-by: Paul E. McKenney Signed-off-by: Thomas Gleixner Cc: Frederic Weisbecker Link: https://lkml.kernel.org/r/20181220170525.GA12579@linux.ibm.com

rcu: Clean up flavor-related definitions and comments in Kconfig

2018-08-30T23:03:32Z

Signed-off-by: Paul E. McKenney

rcu: Update comments and help text for no more RCU-bh updaters

2018-08-30T23:02:42Z

This commit updates comments and help text to account for the fact that RCU-bh update-side functions are now simple wrappers for their RCU or RCU-sched counterparts. Signed-off-by: Paul E. McKenney

rcu: Drive TASKS_RCU directly off of PREEMPT

2017-08-17T14:26:04Z

The actual use of TASKS_RCU is only when PREEMPT, otherwise RCU-sched is used instead. This commit therefore makes synchronize_rcu_tasks() and call_rcu_tasks() available always, but mapped to synchronize_sched() and call_rcu_sched(), respectively, when !PREEMPT. This approach also allows some #ifdefs to be removed from rcutorture. Reported-by: Ingo Molnar Signed-off-by: Paul E. McKenney Reviewed-by: Masami Hiramatsu Acked-by: Ingo Molnar

rcu: Remove RCU CPU stall warnings from Tiny RCU

2017-06-09T01:52:45Z

Tiny RCU's job is to be tiny, so this commit removes its RCU CPU stall warning code. After this, there is no longer any need for rcu_sched_ctrlblk and rcu_bh_ctrlblk to be in tiny_plugin.h, so this commit also moves them to tiny.c. Signed-off-by: Paul E. McKenney

rcu: Move RCU non-debug Kconfig options to kernel/rcu

2017-06-09T01:52:44Z

RCU's Kconfig options are scattered, and there are enough of them that it would be good for them to be more centralized. This commit therefore extracts RCU's Kconfig options from init/Kconfig into a new kernel/rcu/Kconfig file. Reported-by: Ingo Molnar Signed-off-by: Paul E. McKenney