linux-kernel - [tip: timers/core] clockevents: Use dedicated list iterator variable

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Date:   Sun, 10 Apr 2022 10:47:04 -0000
From:   "tip-bot2 for Jakob Koschel" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Jakob Koschel <jakobkoschel@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: timers/core] clockevents: Use dedicated list iterator variable

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     2966a9918dfab183a1cb6be6794981ebe2abff83
Gitweb:        https://git.kernel.org/tip/2966a9918dfab183a1cb6be6794981ebe2abff83
Author:        Jakob Koschel <jakobkoschel@...il.com>
AuthorDate:    Thu, 31 Mar 2022 23:57:07 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Sun, 10 Apr 2022 12:38:45 +02:00

clockevents: Use dedicated list iterator variable

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable.

Signed-off-by: Jakob Koschel <jakobkoschel@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Link: https://lore.kernel.org/r/20220331215707.883957-1-jakobkoschel@gmail.com
---
 kernel/time/clockevents.c |  9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 003ccf3..5d85014 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -690,7 +690,7 @@ static ssize_t unbind_device_store(struct device *dev,
 {
 	char name[CS_NAME_LEN];
 	ssize_t ret = sysfs_get_uname(buf, name, count);
-	struct clock_event_device *ce;
+	struct clock_event_device *ce = NULL, *iter;
 
 	if (ret < 0)
 		return ret;
@@ -698,9 +698,10 @@ static ssize_t unbind_device_store(struct device *dev,
 	ret = -ENODEV;
 	mutex_lock(&clockevents_mutex);
 	raw_spin_lock_irq(&clockevents_lock);
-	list_for_each_entry(ce, &clockevent_devices, list) {
-		if (!strcmp(ce->name, name)) {
-			ret = __clockevents_try_unbind(ce, dev->id);
+	list_for_each_entry(iter, &clockevent_devices, list) {
+		if (!strcmp(iter->name, name)) {
+			ret = __clockevents_try_unbind(iter, dev->id);
+			ce = iter;
 			break;
 		}
 	}