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rcu: Directly drive TASKS_RCU from Kconfig 

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>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
This commit is contained in:
Paul E. McKenney 2015-04-20 05:42:50 -07:00
parent 0f41c0ddad
commit 82d0f4c089
2 changed files with 2 additions and 3 deletions
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4
init/Kconfig
View File

@ -509,7 +509,7 @@ config SRCU
sections.
config TASKS_RCU
bool "Task_based RCU implementation using voluntary context switch"
bool
default n
select SRCU
help
@ -517,8 +517,6 @@ 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

1
lib/Kconfig.debug
View File

@ -1233,6 +1233,7 @@ 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