linux-kernel - Re: [PATCH v3 6/7] vfio: platform: use list of registered reset function

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Message-ID: <562A3FFC.4050504@linaro.org>
Date:	Fri, 23 Oct 2015 16:11:08 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
Cc:	eric.auger@...com, alex.williamson@...hat.com,
	b.reynal@...tualopensystems.com, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	christoffer.dall@...aro.org, patches@...aro.org
Subject: Re: [PATCH v3 6/7] vfio: platform: use list of registered reset
 function

Hi Arnd,
On 10/23/2015 03:12 PM, Arnd Bergmann wrote:
> On Friday 23 October 2015 14:37:14 Eric Auger wrote:
>> Remove the static lookup table and use the dynamic list of registered
>> reset functions instead. Also load the reset module through its alias.
>> The reset struct module pointer is stored in vfio_platform_device.
>>
>> We also remove the useless struct device pointer parameter in
>> vfio_platform_get_reset.
>>
>> This patch fixes the issue related to the usage of __symbol_get, which
>> besides from being moot, prevented compilation with CONFIG_MODULES
>> disabled.
>>
>> Also usage of MODULE_ALIAS makes possible to add a new reset module
>> without needing to update the framework. This was suggested by Arnd.
>>
>> Signed-off-by: Eric Auger <eric.auger@...aro.org>
>> Reported-by: Arnd Bergmann <arnd@...db.de>
>>
>>
> Reviewed-by: Arnd Bergmann <arnd@...db.de>
> 
> but doesn't this need to come before patch 4/7?
Well I don't think so. In [4] we introduce the dynamic registration
method but until this patch we still use the old lookup method in the
static table. I tested and the reset lookup still works in [4].
If we put this one before the registration, the functionality will be
lost here.

Eric

> 	Arnd
> 

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