rcu: Hide RCU_NOCB_CPU behind RCU_EXPERT

[deliverable/linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index af09b4fb43d291856708eb78197adb74dd1b4f48..ba1e6eaf4c36e72bdf29d0b683b9c118fb0b38db 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -538,15 +538,6 @@ config RCU_STALL_COMMON
 config CONTEXT_TRACKING
        bool
 
-config RCU_USER_QS
-       bool
-       help
-         This option sets hooks on kernel / userspace boundaries and
-         puts RCU in extended quiescent state when the CPU runs in
-         userspace. It means that when a CPU runs in userspace, it is
-         excluded from the global RCU state machine and thus doesn't
-         try to keep the timer tick on for RCU.
-
 config CONTEXT_TRACKING_FORCE
        bool "Force context tracking"
        depends on CONTEXT_TRACKING
@@ -707,6 +698,7 @@ config RCU_BOOST_DELAY
 config RCU_NOCB_CPU
        bool "Offload RCU callback processing from boot-selected CPUs"
        depends on TREE_RCU || PREEMPT_RCU
+       depends on RCU_EXPERT || NO_HZ_FULL
        default n
        help
          Use this option to reduce OS jitter for aggressive HPC or