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-rw-r--r--init/Kconfig34
1 files changed, 13 insertions, 21 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 513586facb2b..08e50c5c8948 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -470,7 +470,6 @@ choice
config TREE_RCU
bool "Tree-based hierarchical RCU"
depends on !PREEMPT && SMP
- select IRQ_WORK
help
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or
@@ -480,7 +479,6 @@ config TREE_RCU
config PREEMPT_RCU
bool "Preemptible tree-based hierarchical RCU"
depends on PREEMPT
- select IRQ_WORK
help
This option selects the RCU implementation that is
designed for very large SMP systems with hundreds or
@@ -501,9 +499,17 @@ config TINY_RCU
endchoice
+config SRCU
+ bool
+ help
+ This option selects the sleepable version of RCU. This version
+ permits arbitrary sleeping or blocking within RCU read-side critical
+ sections.
+
config TASKS_RCU
bool "Task_based RCU implementation using voluntary context switch"
default n
+ select SRCU
help
This option enables a task-based RCU implementation that uses
only voluntary context switch (not preemption!), idle, and
@@ -668,9 +674,10 @@ config RCU_BOOST
config RCU_KTHREAD_PRIO
int "Real-time priority to use for RCU worker threads"
- range 1 99
- depends on RCU_BOOST
- default 1
+ range 1 99 if RCU_BOOST
+ range 0 99 if !RCU_BOOST
+ default 1 if RCU_BOOST
+ default 0 if !RCU_BOOST
help
This option specifies the SCHED_FIFO priority value that will be
assigned to the rcuc/n and rcub/n threads and is also the value
@@ -1280,22 +1287,6 @@ source "usr/Kconfig"
endif
-config INIT_FALLBACK
- bool "Fall back to defaults if init= parameter is bad"
- default y
- help
- If enabled, the kernel will try the default init binaries if an
- explicit request from the init= parameter fails.
-
- This can have unexpected effects. For example, booting
- with init=/sbin/kiosk_app will run /sbin/init or even /bin/sh
- if /sbin/kiosk_app cannot be executed.
-
- The default value of Y is consistent with historical behavior.
- Selecting N is likely to be more appropriate for most uses,
- especially on kiosks and on kernels that are intended to be
- run under the control of a script.
-
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size"
help
@@ -1595,6 +1586,7 @@ config PERF_EVENTS
depends on HAVE_PERF_EVENTS
select ANON_INODES
select IRQ_WORK
+ select SRCU
help
Enable kernel support for various performance events provided
by software and hardware.