[lkml]   [2013]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH V3: Add Smp support for Allwinner A20. 1/3] Add smp support for Allwinner A20(sunxi 7i).
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.


On 26 September 2013 02:44, Maxime Ripard
<> wrote:
> 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

 \ /
  Last update: 2013-09-28 16:21    [W:0.813 / U:1.668 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site