linux-kernel - Re: [PATCH 3/3] raid: substitute empty_zero_page with helper ZERO

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Message-ID: <fa21b2b9-50cc-48a5-eec1-e3360be9d296@benettiengineering.com>
Date:   Wed, 19 Oct 2022 18:12:18 +0200
From:   Giulio Benetti <giulio.benetti@...ettiengineering.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-raid@...r.kernel.org,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, Mark Brown <broonie@...nel.org>,
        Song Liu <song@...nel.org>
Subject: Re: [PATCH 3/3] raid: substitute empty_zero_page with helper
 ZERO_PAGE(0)

Hi Christoph, All,

On 19/10/22 13:00, Christoph Hellwig wrote:
> On Tue, Oct 18, 2022 at 11:57:55PM +0200, Giulio Benetti wrote:
>>   #if RAID6_USE_EMPTY_ZERO_PAGE
>> -# define raid6_empty_zero_page empty_zero_page
>> +# define raid6_empty_zero_page ZERO_PAGE(0)
>>   #else
>>   extern const char raid6_empty_zero_page[PAGE_SIZE];
> 
> RAID6_USE_EMPTY_ZERO_PAGE is never set to a non-zero value.  So this
> is dead code and we can just remove all code related to the
> RAID6_USE_EMPTY_ZERO_PAGE case.

Here is a patch that removes that unused code:
https://lore.kernel.org/all/20221019160407.7550-1-giulio.benetti@benettiengineering.com/T/#u

and then makes this one useless so I ask to drop it please.

Thank you!

Best regards
-- 
Giulio Benetti
CEO/CTO@...etti Engineering sas