rcu: Teach RCU that idle task is not quiscent state at boot

[net-next-2.6.git] / include / linux / rcuclassic.h

diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h
index f3f697df1d71b439b677efbc0da952ae6d25d066..80044a4f3ab9e1c890021fc0ff9dca533c00f71e 100644 (file)
--- a/include/linux/rcuclassic.h
+++ b/include/linux/rcuclassic.h
@@ -181,4 +181,10 @@ extern long rcu_batches_completed_bh(void);
 #define rcu_enter_nohz()       do { } while (0)
 #define rcu_exit_nohz()                do { } while (0)
 
+/* A context switch is a grace period for rcuclassic. */
+static inline int rcu_blocking_is_gp(void)
+{
+       return num_online_cpus() == 1;
+}
+
 #endif /* __LINUX_RCUCLASSIC_H */