From: maxime.ripard@free-electrons.com (Maxime Ripard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3: Add Smp support for Allwinner A20. 1/3] Add smp support for Allwinner A20(sunxi 7i).
Date: Wed, 25 Sep 2013 21:44:35 +0300 [thread overview]
Message-ID: <20130925184435.GH2954@lukather> (raw)
In-Reply-To: <CAK3cCBwLrnV7L9WzJ+1P_62PEjEEtgzVjFH8m6SZzWG1O+2vEw@mail.gmail.com>
Hi Fan,
On Wed, Sep 25, 2013 at 12:22:44AM +0800, cinifr wrote:
> > You still haven't said why you don't want to use smp_init_cpus there.
> I find that of_funcation liking of_find_matching_node and of_iomap can
> not run well in smp_init_cpus. It cause kernel crash. So I have to use
> early_initcall.
Ah, right.
Then, can't we use smp_prepare_cpus for this? it looks to be late enough
so that we can use ioremap there.
I don't want it to be an initcall. The code will be different on the
A31, and we don't want it to be run on all the other machines whenever
we boot a multiplatform kernel anyway.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: cinifr <cinifr@gmail.com>
Cc: coosty@163.com, Daniel Lezcano <daniel.lezcano@linaro.org>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
"pawel.moll@arm.co" <pawel.moll@arm.co>,
Rob Herring <rob.herring@calxeda.com>,
"linux-sunxi@googlegroups.com" <linux-sunxi@googlegroups.com>
Subject: Re: [PATCH V3: Add Smp support for Allwinner A20. 1/3] Add smp support for Allwinner A20(sunxi 7i).
Date: Wed, 25 Sep 2013 21:44:35 +0300 [thread overview]
Message-ID: <20130925184435.GH2954@lukather> (raw)
In-Reply-To: <CAK3cCBwLrnV7L9WzJ+1P_62PEjEEtgzVjFH8m6SZzWG1O+2vEw@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 742 bytes --]
Hi Fan,
On Wed, Sep 25, 2013 at 12:22:44AM +0800, cinifr wrote:
> > You still haven't said why you don't want to use smp_init_cpus there.
> I find that of_funcation liking of_find_matching_node and of_iomap can
> not run well in smp_init_cpus. It cause kernel crash. So I have to use
> early_initcall.
Ah, right.
Then, can't we use smp_prepare_cpus for this? it looks to be late enough
so that we can use ioremap there.
I don't want it to be an initcall. The code will be different on the
A31, and we don't want it to be run on all the other machines whenever
we boot a multiplatform kernel anyway.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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next prev parent reply other threads:[~2013-09-25 18:44 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-22 12:21 [PATCH V3: Add Smp support for Allwinner A20. 0/3] Fan Rong
2013-09-22 12:21 ` Fan Rong
2013-09-22 12:21 ` [PATCH V3: Add Smp support for Allwinner A20. 1/3] Add smp support for Allwinner A20(sunxi 7i) Fan Rong
2013-09-22 12:21 ` Fan Rong
2013-09-22 13:00 ` Russell King - ARM Linux
2013-09-22 13:00 ` Russell King - ARM Linux
2013-09-22 13:50 ` cinifr
2013-09-22 13:50 ` cinifr
2013-09-22 14:44 ` [linux-sunxi] " Ian Campbell
2013-09-22 14:44 ` Ian Campbell
[not found] ` <CAK3cCBzMXdeeSPC-OpWcHAuef=ocpy5n0=Fc2yBECPnU=2OTXw@mail.gmail.com>
2013-09-23 7:18 ` [PATCH " Ian Campbell
2013-09-23 7:18 ` Ian Campbell
2013-09-23 14:43 ` cinifr
2013-09-23 14:43 ` cinifr
2013-09-23 18:34 ` maxime.ripard at free-electrons.com
2013-09-23 18:34 ` maxime.ripard
2013-09-26 17:03 ` [linux-sunxi] [PATCH V3: Add Smp support for Allwinner A20. " Ben Dooks
2013-09-23 18:17 ` Maxime Ripard
2013-09-23 18:17 ` Maxime Ripard
2013-09-24 16:22 ` cinifr
2013-09-24 16:22 ` cinifr
2013-09-25 18:44 ` Maxime Ripard [this message]
2013-09-25 18:44 ` Maxime Ripard
2013-09-28 13:48 ` cinifr
2013-09-28 13:48 ` cinifr
2013-09-30 16:47 ` Maxime Ripard
2013-09-30 16:47 ` Maxime Ripard
2013-10-02 20:13 ` Russell King - ARM Linux
2013-10-02 20:13 ` Russell King - ARM Linux
2013-09-22 12:21 ` [PATCH V3: Add Smp support for Allwinner A20. 2/3] Add cpuconfig nodes in dts for smp configure Fan Rong
2013-09-22 12:21 ` Fan Rong
2013-09-23 17:03 ` Maxime Ripard
2013-09-23 17:03 ` Maxime Ripard
2013-09-22 12:21 ` [PATCH V3: Add Smp support for Allwinner A20. 3/3] add arch count timer node in dts for Allwinner A20(sunxi 7i) Fan Rong
2013-09-22 12:21 ` Fan Rong
2013-09-23 17:06 ` Maxime Ripard
2013-09-23 17:06 ` Maxime Ripard
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