From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Thomas Bogendoerfer <tbogendoerfer@suse.de>,
Paul Burton <paul.burton@mips.com>,
Ralf Baechle <ralf@linux-mips.org>,
James Hogan <jhogan@kernel.org>,
linux-mips@vger.kernel.org, Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.19 04/68] MIPS: kernel: only use i8253 clocksource with periodic clockevent
Date: Tue, 13 Aug 2019 22:14:42 -0400 [thread overview]
Message-ID: <20190814021548.16001-4-sashal@kernel.org> (raw)
In-Reply-To: <20190814021548.16001-1-sashal@kernel.org>
From: Thomas Bogendoerfer <tbogendoerfer@suse.de>
[ Upstream commit a07e3324538a989b7cdbf2c679be6a7f9df2544f ]
i8253 clocksource needs a free running timer. This could only
be used, if i8253 clockevent is set up as periodic.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/mips/kernel/i8253.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c
index 5f209f111e59e..df7ddd246eaac 100644
--- a/arch/mips/kernel/i8253.c
+++ b/arch/mips/kernel/i8253.c
@@ -32,7 +32,8 @@ void __init setup_pit_timer(void)
static int __init init_pit_clocksource(void)
{
- if (num_possible_cpus() > 1) /* PIT does not scale! */
+ if (num_possible_cpus() > 1 || /* PIT does not scale! */
+ !clockevent_state_periodic(&i8253_clockevent))
return 0;
return clocksource_i8253_init();
--
2.20.1
next parent reply other threads:[~2019-08-14 2:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190814021548.16001-1-sashal@kernel.org>
2019-08-14 2:14 ` Sasha Levin [this message]
2019-08-14 2:14 ` [PATCH AUTOSEL 4.19 05/68] mips: fix cacheinfo Sasha Levin
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