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-rw-r--r--include/linux/srcu.h7
-rw-r--r--init/Kconfig1
2 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 4c1d5f7e62c4..ea356d800675 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -62,8 +62,13 @@ int init_srcu_struct(struct srcu_struct *sp);
#include <linux/srcutree.h>
#elif defined(CONFIG_CLASSIC_SRCU)
#include <linux/srcuclassic.h>
-#else
+#elif defined(CONFIG_SRCU)
#error "Unknown SRCU implementation specified to kernel configuration"
+#else
+
+/* Dummy definition for things like notifiers. Actual use gets link error. */
+struct srcu_struct { };
+
#endif
/**
diff --git a/init/Kconfig b/init/Kconfig
index 1d3475fc9496..d928a3724af9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -521,7 +521,6 @@ config RCU_EXPERT
config SRCU
bool
- default y
help
This option selects the sleepable version of RCU. This version
permits arbitrary sleeping or blocking within RCU read-side critical