Hi  Maxime,
    I have test it, but I found it does not work. If using
smp_prepare_cpus, the kernenl cannot find the secondary cpus because
that smp_prepare_cpus semms not be excuted before kernel is booting
secondary cpus. So I have to use early_initcall.

Fan.

On 26 September 2013 02:44, Maxime Ripard
[off-list ref] wrote:

Hi Fan,

On Wed, Sep 25, 2013 at 12:22:44AM +0800, cinifr wrote:

quoted

quoted

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