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authorIngo Molnar <mingo@elte.hu>2009-10-26 07:55:55 +0100
committerIngo Molnar <mingo@elte.hu>2009-10-26 09:40:40 +0100
commit4ce5b90340879ce93d169b7b523c2cbbe7c45843 (patch)
tree1372672a37f331a49c3825876a4c3e71ad2df3a0 /kernel/rcutiny.c
parentcf886c44ec418a01b2c52493465accb81acbf930 (diff)
downloadlinux-2.6.34-ux500-4ce5b90340879ce93d169b7b523c2cbbe7c45843.tar.gz
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: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutiny.c')
-rw-r--r--kernel/rcutiny.c49
1 files changed, 23 insertions, 26 deletions
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 0b54efde66a..b33ec3aa377 100644
--- a/kernel/rcutiny.c
+++ b/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);
}