1 files changed, 0 insertions, 75 deletions
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
index 463f29743ea0..bf987b95b356 100644
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -52,78 +52,3 @@ config PREEMPT
 endchoice
-choice
-        prompt "RCU Implementation"
-        default CLASSIC_RCU
-config CLASSIC_RCU
-        bool "Classic RCU"
-        help
-          This option selects the classic RCU implementation that is
-          designed for best read-side performance on non-realtime
-          systems.
-          
-          Select this option if you are unsure.
-config TREE_RCU
-        bool "Tree-based hierarchical RCU"
-        help
-          This option selects the RCU implementation that is
-          designed for very large SMP system with hundreds or
-          thousands of CPUs.
-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.
-endchoice
-config RCU_TRACE
-        bool "Enable tracing for RCU"
-        depends on TREE_RCU || PREEMPT_RCU
-        help
-          This option provides tracing in RCU which presents stats
-          in debugfs for debugging RCU implementation.
-          Say Y here if you want to enable RCU tracing
-          Say N if you are unsure.
-config RCU_FANOUT
-        int "Tree-based hierarchical RCU fanout value"
-        range 2 64 if 64BIT
-        range 2 32 if !64BIT
-        depends on TREE_RCU
-        default 64 if 64BIT
-        default 32 if !64BIT
-        help
-          This option controls the fanout of hierarchical implementations
-          of RCU, allowing RCU to work efficiently on machines with
-          large numbers of CPUs.  This value must be at least the cube
-          root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
-          systems and up to 262,144 for 64-bit systems.
-          Select a specific number if testing RCU itself.
-          Take the default if unsure.
-config RCU_FANOUT_EXACT
-        bool "Disable tree-based hierarchical RCU auto-balancing"
-        depends on TREE_RCU
-        default n
-        help
-          This option forces use of the exact RCU_FANOUT value specified,
-          regardless of imbalances in the hierarchy.  This is useful for
-          testing RCU itself, and might one day be useful on systems with
-          strong NUMA behavior.
-          Without RCU_FANOUT_EXACT, the code will balance the hierarchy.
-          Say n if unsure.
-

diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index 463f29743ea0..bf987b95b356 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt
@@ -52,78 +52,3 @@ config PREEMPT
52		52
53	endchoice	53	endchoice
54		54
55	choice
56	prompt "RCU Implementation"
57	default CLASSIC_RCU
58
59	config CLASSIC_RCU
60	bool "Classic RCU"
61	help
62	This option selects the classic RCU implementation that is
63	designed for best read-side performance on non-realtime
64	systems.
65
66	Select this option if you are unsure.
67
68	config TREE_RCU
69	bool "Tree-based hierarchical RCU"
70	help
71	This option selects the RCU implementation that is
72	designed for very large SMP system with hundreds or
73	thousands of CPUs.
74
75	config PREEMPT_RCU
76	bool "Preemptible RCU"
77	depends on PREEMPT
78	help
79	This option reduces the latency of the kernel by making certain
80	RCU sections preemptible. Normally RCU code is non-preemptible, if
81	this option is selected then read-only RCU sections become
82	preemptible. This helps latency, but may expose bugs due to
83	now-naive assumptions about each RCU read-side critical section
84	remaining on a given CPU through its execution.
85
86	endchoice
87
88	config RCU_TRACE
89	bool "Enable tracing for RCU"
90	depends on TREE_RCU \|\| PREEMPT_RCU
91	help
92	This option provides tracing in RCU which presents stats
93	in debugfs for debugging RCU implementation.
94
95	Say Y here if you want to enable RCU tracing
96	Say N if you are unsure.
97
98	config RCU_FANOUT
99	int "Tree-based hierarchical RCU fanout value"
100	range 2 64 if 64BIT
101	range 2 32 if !64BIT
102	depends on TREE_RCU
103	default 64 if 64BIT
104	default 32 if !64BIT
105	help
106	This option controls the fanout of hierarchical implementations
107	of RCU, allowing RCU to work efficiently on machines with
108	large numbers of CPUs. This value must be at least the cube
109	root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
110	systems and up to 262,144 for 64-bit systems.
111
112	Select a specific number if testing RCU itself.
113	Take the default if unsure.
114
115	config RCU_FANOUT_EXACT
116	bool "Disable tree-based hierarchical RCU auto-balancing"
117	depends on TREE_RCU
118	default n
119	help
120	This option forces use of the exact RCU_FANOUT value specified,
121	regardless of imbalances in the hierarchy. This is useful for
122	testing RCU itself, and might one day be useful on systems with
123	strong NUMA behavior.
124
125	Without RCU_FANOUT_EXACT, the code will balance the hierarchy.
126
127	Say n if unsure.
128
129