rcu: Do tiny cleanups in rcutiny

No change in functionality - just straighten out a few small
stylistic details.

Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: avi@redhat.com
Cc: mtosatti@redhat.com
LKML-Reference: <12565226351355-git-send-email->
Signed-off-by: NIngo Molnar <mingo@elte.hu>

include/linux/rcutiny.h

@@ -20,9 +20,8 @@
  * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  *
  * For detailed explanation of Read-Copy Update mechanism see -
- * 		Documentation/RCU
+ *		Documentation/RCU
  */
-
 #ifndef __LINUX_TINY_H
 #define __LINUX_TINY_H
 
@@ -70,8 +69,7 @@ static inline void synchronize_rcu_bh_expedited(void)
 }
 
 struct notifier_block;
-extern int rcu_cpu_notify(struct notifier_block *self,
-			  unsigned long action, void *hcpu);
+extern int rcu_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu);
 
 #ifdef CONFIG_NO_HZ
 

kernel/rcutiny.c

@@ -20,22 +20,21 @@
  * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  *
  * For detailed explanation of Read-Copy Update mechanism see -
- * 		Documentation/RCU
+ *		Documentation/RCU
  */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/rcupdate.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <linux/completion.h>
 #include <linux/moduleparam.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
 #include <linux/notifier.h>
-#include <linux/cpu.h>
+#include <linux/rcupdate.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/init.h>
 #include <linux/time.h>
+#include <linux/cpu.h>
 
 /* Global control variables for rcupdate callback mechanism. */
 struct rcu_ctrlblk {
@@ -46,14 +45,13 @@ struct rcu_ctrlblk {
 
 /* Definition for rcupdate control block. */
 static struct rcu_ctrlblk rcu_ctrlblk = {
-	.rcucblist = NULL,
-	.donetail = &rcu_ctrlblk.rcucblist,
-	.curtail = &rcu_ctrlblk.rcucblist,
+	.donetail	= &rcu_ctrlblk.rcucblist,
+	.curtail	= &rcu_ctrlblk.rcucblist,
 };
+
 static struct rcu_ctrlblk rcu_bh_ctrlblk = {
-	.rcucblist = NULL,
-	.donetail = &rcu_bh_ctrlblk.rcucblist,
-	.curtail = &rcu_bh_ctrlblk.rcucblist,
+	.donetail	= &rcu_bh_ctrlblk.rcucblist,
+	.curtail	= &rcu_bh_ctrlblk.rcucblist,
 };
 
 #ifdef CONFIG_NO_HZ
@@ -84,8 +82,8 @@ void rcu_exit_nohz(void)
 
 /*
  * Helper function for rcu_qsctr_inc() and rcu_bh_qsctr_inc().
- * Also disable irqs to avoid confusion due to interrupt handlers invoking
- * call_rcu().
+ * Also disable irqs to avoid confusion due to interrupt handlers
+ * invoking call_rcu().
  */
 static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
 {
@@ -99,6 +97,7 @@ static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
 		return 1;
 	}
 	local_irq_restore(flags);
+
 	return 0;
 }
 
@@ -143,8 +142,8 @@ void rcu_check_callbacks(int cpu, int user)
  */
 static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
 {
-	unsigned long flags;
 	struct rcu_head *next, *list;
+	unsigned long flags;
 
 	/* If no RCU callbacks ready to invoke, just return. */
 	if (&rcp->rcucblist == rcp->donetail)
@@ -182,8 +181,7 @@ static void rcu_process_callbacks(struct softirq_action *unused)
  * Null function to handle CPU being onlined.  Longer term, we want to
  * make TINY_RCU avoid using rcupdate.c, but later...
  */
-int rcu_cpu_notify(struct notifier_block *self,
-		   unsigned long action, void *hcpu)
+int rcu_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
 {
 	return NOTIFY_OK;
 }
@@ -223,6 +221,7 @@ static void __call_rcu(struct rcu_head *head,
 
 	head->func = func;
 	head->next = NULL;
+
 	local_irq_save(flags);
 	*rcp->curtail = head;
 	rcp->curtail = &head->next;
@@ -234,8 +233,7 @@ static void __call_rcu(struct rcu_head *head,
  * period.  But since we have but one CPU, that would be after any
  * quiescent state.
  */
-void call_rcu(struct rcu_head *head,
-	      void (*func)(struct rcu_head *rcu))
+void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
 {
 	__call_rcu(head, func, &rcu_ctrlblk);
 }
@@ -245,8 +243,7 @@ EXPORT_SYMBOL_GPL(call_rcu);
  * Post an RCU bottom-half callback to be invoked after any subsequent
  * quiescent state.
  */
-void call_rcu_bh(struct rcu_head *head,
-		 void (*func)(struct rcu_head *rcu))
+void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
 {
 	__call_rcu(head, func, &rcu_bh_ctrlblk);
 }