rcu: Consolidate debugging Kconfig options

The RCU-related debugging Kconfig options are in two different places,
and consume too much screen real estate.  This commit therefore
consolidates them into their own menu.

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 3a353091a90390f6b95b632408797d14908d57f3..122db3d323c88a338211bf3570e57f140deefc7a 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -605,61 +605,6 @@ config PROVE_LOCKING
 
         For more details, see Documentation/lockdep-design.txt.
 
-config PROVE_RCU
-       bool "RCU debugging: prove RCU correctness"
-       depends on PROVE_LOCKING
-       default n
-       help
-        This feature enables lockdep extensions that check for correct
-        use of RCU APIs.  This is currently under development.  Say Y
-        if you want to debug RCU usage or help work on the PROVE_RCU
-        feature.
-
-        Say N if you are unsure.
-
-config PROVE_RCU_REPEATEDLY
-       bool "RCU debugging: don't disable PROVE_RCU on first splat"
-       depends on PROVE_RCU
-       default n
-       help
-        By itself, PROVE_RCU will disable checking upon issuing the
-        first warning (or "splat").  This feature prevents such
-        disabling, allowing multiple RCU-lockdep warnings to be printed
-        on a single reboot.
-
-        Say Y to allow multiple RCU-lockdep warnings per boot.
-
-        Say N if you are unsure.
-
-config PROVE_RCU_DELAY
-       bool "RCU debugging: preemptible RCU race provocation"
-       depends on DEBUG_KERNEL && PREEMPT_RCU
-       default n
-       help
-        There is a class of races that involve an unlikely preemption
-        of __rcu_read_unlock() just after ->rcu_read_lock_nesting has
-        been set to INT_MIN.  This feature inserts a delay at that
-        point to increase the probability of these races.
-
-        Say Y to increase probability of preemption of __rcu_read_unlock().
-
-        Say N if you are unsure.
-
-config SPARSE_RCU_POINTER
-       bool "RCU debugging: sparse-based checks for pointer usage"
-       default n
-       help
-        This feature enables the __rcu sparse annotation for
-        RCU-protected pointers.  This annotation will cause sparse
-        to flag any non-RCU used of annotated pointers.  This can be
-        helpful when debugging RCU usage.  Please note that this feature
-        is not intended to enforce code cleanliness; it is instead merely
-        a debugging aid.
-
-        Say Y to make sparse flag questionable use of RCU-protected pointers
-
-        Say N if you are unsure.
-
 config LOCKDEP
        bool
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
@@ -937,6 +882,63 @@ config BOOT_PRINTK_DELAY
          BOOT_PRINTK_DELAY also may cause LOCKUP_DETECTOR to detect
          what it believes to be lockup conditions.
 
+menu "RCU Debugging"
+
+config PROVE_RCU
+       bool "RCU debugging: prove RCU correctness"
+       depends on PROVE_LOCKING
+       default n
+       help
+        This feature enables lockdep extensions that check for correct
+        use of RCU APIs.  This is currently under development.  Say Y
+        if you want to debug RCU usage or help work on the PROVE_RCU
+        feature.
+
+        Say N if you are unsure.
+
+config PROVE_RCU_REPEATEDLY
+       bool "RCU debugging: don't disable PROVE_RCU on first splat"
+       depends on PROVE_RCU
+       default n
+       help
+        By itself, PROVE_RCU will disable checking upon issuing the
+        first warning (or "splat").  This feature prevents such
+        disabling, allowing multiple RCU-lockdep warnings to be printed
+        on a single reboot.
+
+        Say Y to allow multiple RCU-lockdep warnings per boot.
+
+        Say N if you are unsure.
+
+config PROVE_RCU_DELAY
+       bool "RCU debugging: preemptible RCU race provocation"
+       depends on DEBUG_KERNEL && PREEMPT_RCU
+       default n
+       help
+        There is a class of races that involve an unlikely preemption
+        of __rcu_read_unlock() just after ->rcu_read_lock_nesting has
+        been set to INT_MIN.  This feature inserts a delay at that
+        point to increase the probability of these races.
+
+        Say Y to increase probability of preemption of __rcu_read_unlock().
+
+        Say N if you are unsure.
+
+config SPARSE_RCU_POINTER
+       bool "RCU debugging: sparse-based checks for pointer usage"
+       default n
+       help
+        This feature enables the __rcu sparse annotation for
+        RCU-protected pointers.  This annotation will cause sparse
+        to flag any non-RCU used of annotated pointers.  This can be
+        helpful when debugging RCU usage.  Please note that this feature
+        is not intended to enforce code cleanliness; it is instead merely
+        a debugging aid.
+
+        Say Y to make sparse flag questionable use of RCU-protected pointers
+
+        Say N if you are unsure.
+
 config RCU_TORTURE_TEST
        tristate "torture tests for RCU"
        depends on DEBUG_KERNEL
@@ -1015,6 +1017,8 @@ config RCU_TRACE
          Say Y here if you want to enable RCU tracing
          Say N if you are unsure.
 
+endmenu # "RCU Debugging"
+
 config KPROBES_SANITY_TEST
        bool "Kprobes sanity tests"
        depends on DEBUG_KERNEL