linux-kernel - Re: [RFC 08/17] ARM: mvebu: remove custom .init

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Date:	Fri, 23 Aug 2013 12:32:30 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
CC:	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 08/17] ARM: mvebu: remove custom .init_time hook

On 08/23/13 12:06, Gregory CLEMENT wrote:
> On 20/08/2013 04:04, Sebastian Hesselbarth wrote:
>> With arch/arm calling of_clk_init(NULL) from time_init(), we can now
>> remove custom .init_time hooks.
>
> As a feared it won't work on Armada XP. You moved coherency_init(), and
> l2x0_of_init() in the init_machine hook. However init_machine is an
> arch_initcall, and as all the initcall it is called at the end of the
> do_basic_setup() which is called after smp_prepare_cpus(). The issue is
> that smp_prepare_cpus need coherency (and I think L2 cache) already enable.

Ok, I see. I remember mvebu smp relies on mbus mappings also? Can you
try below as replacement for the mach-mvebu/armada-370-xp.c changes?

It will move coherency_init(), l2x0_of_init(), and mvebu_mbus_dt_init()
to .init_early hook.

Sebastian


View attachment "arm-of_clk_init-mvebu-proposal.diff" of type "text/x-patch" (1293 bytes)