rcu: Move rcutiny.h to new empty/true/false-function style

This commit saves a few lines in include/linux/rcutiny.h by moving
to single-line definitions for empty functions, instead of the old
style where the two curly braces each get their own line.
Reported-by: NIngo Molnar <mingo@kernel.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

include/linux/rcutiny.h

@@ -33,10 +33,8 @@ static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp)
 	return 0;
 }
 
-static inline bool rcu_eqs_special_set(int cpu)
-{
-	return false;  /* Never flag non-existent other CPUs! */
-}
+/* Never flag non-existent other CPUs! */
+static inline bool rcu_eqs_special_set(int cpu) { return false; }
 
 static inline unsigned long get_state_synchronize_rcu(void)
 {
@@ -102,65 +100,28 @@ static inline void kfree_call_rcu(struct rcu_head *head,
  * Take advantage of the fact that there is only one CPU, which
  * allows us to ignore virtualization-based context switches.
  */
-static inline void rcu_virt_note_context_switch(int cpu)
-{
-}
-
-static inline void rcu_cpu_stall_reset(void)
-{
-}
-
-static inline void rcu_idle_enter(void)
-{
-}
-
-static inline void rcu_idle_exit(void)
-{
-}
-
-static inline void rcu_irq_enter(void)
-{
-}
-
-static inline bool rcu_irq_enter_disabled(void)
-{
-	return false;
-}
-
-static inline void rcu_irq_exit_irqson(void)
-{
-}
-
-static inline void rcu_irq_enter_irqson(void)
-{
-}
-
-static inline void rcu_irq_exit(void)
-{
-}
-
-static inline void exit_rcu(void)
-{
-}
+static inline void rcu_virt_note_context_switch(int cpu) { }
+static inline void rcu_cpu_stall_reset(void) { }
+static inline void rcu_idle_enter(void) { }
+static inline void rcu_idle_exit(void) { }
+static inline void rcu_irq_enter(void) { }
+static inline bool rcu_irq_enter_disabled(void) { return false; }
+static inline void rcu_irq_exit_irqson(void) { }
+static inline void rcu_irq_enter_irqson(void) { }
+static inline void rcu_irq_exit(void) { }
+static inline void exit_rcu(void) { }
 
 #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU)
 extern int rcu_scheduler_active __read_mostly;
 void rcu_scheduler_starting(void);
 #else /* #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) */
-static inline void rcu_scheduler_starting(void)
-{
-}
+static inline void rcu_scheduler_starting(void) { }
 #endif /* #else #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_SRCU) */
 
-static inline bool rcu_is_watching(void)
-{
-	return true;
-}
+static inline bool rcu_is_watching(void) { return true; }
 
-static inline void rcu_all_qs(void)
-{
-	barrier(); /* Avoid RCU read-side critical sections leaking across. */
-}
+/* Avoid RCU read-side critical sections leaking across. */
+static inline void rcu_all_qs(void) { barrier(); }
 
 /* RCUtree hotplug events */
 #define rcutree_prepare_cpu      NULL