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Subject[PATCH tip/core/rcu 01/12] rcu: Directly drive TASKS_RCU from Kconfig
Date
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>

Currently, Kconfig will ask the user whether TASKS_RCU should be set.
This is silly because Kconfig already has all the information that it
needs to set this parameter. This commit therefore directly drives
the value of TASKS_RCU via "select" statements. Which means that
as subsystems require TASKS_RCU, those subsystems will need to add
"select" statements of their own.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
---
init/Kconfig | 4 +---
lib/Kconfig.debug | 1 +
2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 9a0592516f48..353714745015 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -507,7 +507,7 @@ config SRCU
sections.

config TASKS_RCU
- bool "Task_based RCU implementation using voluntary context switch"
+ bool
default n
select SRCU
help
@@ -515,8 +515,6 @@ config TASKS_RCU
only voluntary context switch (not preemption!), idle, and
user-mode execution as quiescent states.

- If unsure, say N.
-
config RCU_STALL_COMMON
def_bool ( TREE_RCU || PREEMPT_RCU || RCU_TRACE )
help
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 285c2292c1ce..4e52ea4bcdcc 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1220,6 +1220,7 @@ config RCU_TORTURE_TEST
depends on DEBUG_KERNEL
select TORTURE_TEST
select SRCU
+ select TASKS_RCU
default n
help
This option provides a kernel module that runs torture tests
--
1.8.1.5


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