From: Peter Zijlstra <peterz@infradead.org>
To: tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
diego.viola@gmail.com, len.brown@intel.com, rjw@rjwysocki.net,
rui.zhang@intel.com
Subject: [PATCH v2 3/7] clocksource: Initialize cs->wd_list
Date: Mon, 30 Apr 2018 12:00:11 +0200 [thread overview]
Message-ID: <20180430100344.472662715@infradead.org> (raw)
In-Reply-To: 20180430100008.503783478@infradead.org
[-- Attachment #1: peterz-tsc-early-fix-3.patch --]
[-- Type: text/plain, Size: 784 bytes --]
A number of places relies on list_empty(&cs->wd_list), however the
list_head does not get initialized. Do so upon registration, such that
thereafter it is possible to rely on list_empty() correctly reflecting
the list membership status.
Tested-by: Diego Viola <diego.viola@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/time/clocksource.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -332,6 +332,8 @@ static void clocksource_resume_watchdog(
static void clocksource_enqueue_watchdog(struct clocksource *cs)
{
+ INIT_LIST_HEAD(&cs->wd_list);
+
if (cs->flags & CLOCK_SOURCE_MUST_VERIFY) {
/* cs is a clocksource to be watched. */
list_add(&cs->wd_list, &watchdog_list);
next prev parent reply other threads:[~2018-04-30 10:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-30 10:00 [PATCH v2 0/7] Various tsc/clocksource fixes Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 1/7] x86,tsc: Always unregister clocksource_tsc_early Peter Zijlstra
2018-05-02 14:12 ` [tip:timers/urgent] x86/tsc: " tip-bot for Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 2/7] clocksource: Allow clocksource_mark_unstable() on unregisered clocksources Peter Zijlstra
2018-05-02 13:35 ` Thomas Gleixner
2018-05-02 13:53 ` Peter Zijlstra
2018-05-02 14:13 ` [tip:timers/urgent] clocksource: Allow clocksource_mark_unstable() on unregistered clocksources tip-bot for Peter Zijlstra
2018-04-30 10:00 ` Peter Zijlstra [this message]
2018-05-02 13:37 ` [PATCH v2 3/7] clocksource: Initialize cs->wd_list Thomas Gleixner
2018-05-02 13:55 ` Peter Zijlstra
2018-05-02 14:13 ` [tip:timers/urgent] " tip-bot for Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 4/7] x86,tsc: Fix mark_tsc_unstable() Peter Zijlstra
2018-05-02 14:14 ` [tip:timers/urgent] x86/tsc: " tip-bot for Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 5/7] clocksource: Consistent de-rate when marking unstable Peter Zijlstra
2018-05-02 14:14 ` [tip:timers/urgent] " tip-bot for Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 6/7] clocksource: Rework stale comment Peter Zijlstra
2018-05-02 14:15 ` [tip:timers/urgent] " tip-bot for Peter Zijlstra
2018-04-30 10:00 ` [PATCH v2 7/7] clocksource: Remove kthread Peter Zijlstra
2018-05-02 14:42 ` [tip:timers/core] " tip-bot for Peter Zijlstra
2018-05-01 9:12 ` [PATCH v2 0/7] Various tsc/clocksource fixes Rafael J. Wysocki
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