linux-kernel - [PATCH] Time: Clocksource: finish searching when clocksource

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Tue, 17 Sep 2013 03:08:30 +0900
From:	ERAMOTO Masaya <eramoto.masaya@...il.com>
To:	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Time: Clocksource: finish searching when clocksource_enqueue()
 found the inserting place.

Hi,

clocksource_enqueue() do extra behavior in the sorted list as below:
   * it compares all clocksources in the list even if found the
     inserting place.
   * it copies to entry until finding there.

So fixed clocksource_enqueue() as below:
   * it finishes to compare clocksource when found there.
   * it copies to entry only when found there.

Signed-off-by: ERAMOTO Masaya <eramoto.masaya@...il.com>
---
  kernel/time/clocksource.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 50a8736..5b340a4 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -700,9 +700,11 @@ static void clocksource_enqueue(struct clocksource *cs)

  	list_for_each_entry(tmp, &clocksource_list, list)
  		/* Keep track of the place, where to insert */
-		if (tmp->rating >= cs->rating)
+		if (tmp->rating < cs->rating) {
  			entry = &tmp->list;
-	list_add(&cs->list, entry);
+			break;
+		}
+	list_add_tail(&cs->list, entry);
  }

  /**
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/