linux-kernel - Re: [PATCH] video: backlight: remove unused header

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Message-id: <4FE1A6D4.2070006@samsung.com>
Date:	Wed, 20 Jun 2012 19:32:52 +0900
From:	Donghwa Lee <dh09.lee@...sung.com>
To:	Florian Tobias Schandinat <FlorianSchandinat@....de>
Cc:	Paul Bolle <pebolle@...cali.nl>, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH] video: backlight: remove unused header

On 6/20/2012 10:11 AM, Florian Tobias Schandinat wrote:

> Hi Paul,
> 
> On 06/13/2012 07:47 AM, Paul Bolle wrote:
>> Commit 9befe40f6e018e508b047eb76d189ede9b4ff03d ("video: backlight:
>> support s6e8ax0 panel driver based on MIPI DSI") added s6e8ax0.h, but
>> no file includes it. That's probably a good thing, because it declares
>> an extern void function that is defined static int in s6e8ax0.c.
>> Besides, that function is also wrapped in the module_init() macro, which
>> should do everything needed to make that function available to the code
>> outside of s6e8ax0.c. This header can safely be removed.
>>
>> Signed-off-by: Paul Bolle <pebolle@...cali.nl>
> 
> it would have been a good idea to CC the authors of this file to get an
> answer to your questions and allow them to comment on the patch. (done)
> I'd like to hear their feedback before I apply your patch but it looks
> reasonable.
> 
> 
> Thanks,
> 
> Florian Tobias Schandinat
> 
>> ---
>> 0) Tested mainly by using various git tools on the (history of the)
>> tree.
>>
>> 1) Shouldn't s6e8ax0_init() and s6e8ax0_exit(), both in s6e8ax0.c, carry
>> the usual __init and __exit attributes?
>>
>> 2) But note that all the module related code in s6e8ax0.c seems moot
>> currently: EXYNOS_LCD_S6E8AX0 is a boolean Kconfig symbol, so the code
>> can only be used builtin. So, as far as I can tell, either that symbol
>> (and the symbols on which it depends) should be made tristate, or the
>> module related code can be removed from s6e8ax0.c.
>>
>>  drivers/video/exynos/s6e8ax0.h |   21 ---------------------
>>  1 files changed, 0 insertions(+), 21 deletions(-)
>>  delete mode 100644 drivers/video/exynos/s6e8ax0.h
>>
>> diff --git a/drivers/video/exynos/s6e8ax0.h b/drivers/video/exynos/s6e8ax0.h
>> deleted file mode 100644
>> index 1f1b270..0000000
>> --- a/drivers/video/exynos/s6e8ax0.h
>> +++ /dev/null
>> @@ -1,21 +0,0 @@
>> -/* linux/drivers/video/backlight/s6e8ax0.h
>> - *
>> - * MIPI-DSI based s6e8ax0 AMOLED LCD Panel definitions.
>> - *
>> - * Copyright (c) 2011 Samsung Electronics
>> - *
>> - * Inki Dae, <inki.dae@...sung.com>
>> - * Donghwa Lee <dh09.lee@...sung.com>
>> - *
>> - * This program is free software; you can redistribute it and/or modify
>> - * it under the terms of the GNU General Public License version 2 as
>> - * published by the Free Software Foundation.
>> -*/
>> -
>> -#ifndef _S6E8AX0_H
>> -#define _S6E8AX0_H
>> -
>> -extern void s6e8ax0_init(void);
>> -
>> -#endif
>> -
> 
> 


Hi,
I had looked through that code. I agree that header file will be removed.
There is no reason to maintain it.

Thank you,
Donghwa Lee

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