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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2009-08-22 13:56:53 -0700
committerIngo Molnar <mingo@elte.hu>2009-08-23 10:32:40 +0200
commit6b3ef48adf847f7adf11c870e3ffacac150f1564 (patch)
treee1403ce515bf00ade99ec806f6ab6b6db999aa0b /init
parentf41d911f8c49a5d65c86504c19e8204bb605c4fd (diff)
downloadlinux-linaro-stable-6b3ef48adf847f7adf11c870e3ffacac150f1564.tar.gz
rcu: Remove CONFIG_PREEMPT_RCU
Now that CONFIG_TREE_PREEMPT_RCU is in place, there is no further need for CONFIG_PREEMPT_RCU. Remove it, along with whatever subtle bugs it may (or may not) contain. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: akpm@linux-foundation.org Cc: mathieu.desnoyers@polymtl.ca Cc: josht@linux.vnet.ibm.com Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org LKML-Reference: <125097461396-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig20
1 files changed, 1 insertions, 19 deletions
diff --git a/init/Kconfig b/init/Kconfig
index f88da2d1c1fb..8e8b76d8a272 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -324,17 +324,6 @@ config TREE_RCU
thousands of CPUs. It also scales down nicely to
smaller systems.
-config PREEMPT_RCU
- bool "Preemptible RCU"
- depends on PREEMPT
- help
- This option reduces the latency of the kernel by making certain
- RCU sections preemptible. Normally RCU code is non-preemptible, if
- this option is selected then read-only RCU sections become
- preemptible. This helps latency, but may expose bugs due to
- now-naive assumptions about each RCU read-side critical section
- remaining on a given CPU through its execution.
-
config TREE_PREEMPT_RCU
bool "Preemptable tree-based hierarchical RCU"
depends on PREEMPT
@@ -348,7 +337,7 @@ endchoice
config RCU_TRACE
bool "Enable tracing for RCU"
- depends on TREE_RCU || PREEMPT_RCU || TREE_PREEMPT_RCU
+ depends on TREE_RCU || TREE_PREEMPT_RCU
help
This option provides tracing in RCU which presents stats
in debugfs for debugging RCU implementation.
@@ -395,13 +384,6 @@ config TREE_RCU_TRACE
TREE_PREEMPT_RCU implementations, permitting Makefile to
trivially select kernel/rcutree_trace.c.
-config PREEMPT_RCU_TRACE
- def_bool RCU_TRACE && PREEMPT_RCU
- select DEBUG_FS
- help
- This option provides tracing for the PREEMPT_RCU implementation,
- permitting Makefile to trivially select kernel/rcupreempt_trace.c.
-
endmenu # "RCU Subsystem"
config IKCONFIG