linux-kernel - Re: [PATCH 1/1] x86/boot: clear some fields explicitly

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Date:   Thu, 25 Jul 2019 14:57:10 -0700
From:   hpa@...or.com
To:     Thomas Gleixner <tglx@...utronix.de>,
        John Hubbard <jhubbard@...dia.com>
CC:     john.hubbard@...il.com, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] x86/boot: clear some fields explicitly

On July 25, 2019 2:48:30 PM PDT, Thomas Gleixner <tglx@...utronix.de> wrote:
>On Thu, 25 Jul 2019, John Hubbard wrote:
>> On 7/25/19 12:22 AM, Thomas Gleixner wrote:
>> > It removes the clearing of the range between kbd_status and hdr
>without any
>> > replacement. It neither clears edid_info.
>> 
>> 
>> Yes. Somehow I left that chunk out. Not my finest hour. 
>
>S*** happens
>
>> > +		char *p = (char *) boot_params;
>> > +		int i;
>> > +
>> > +		for (i = 0; i < ARRAY_SIZE(toclear); i++)
>> > +			memset(p + toclear[i].start, 0, toclear[i].len);
>> >  	}
>> >  }
>> 
>> Looks nice.
>
>I have no idea whether it works and I have no cycles either, so I would
>appreciate it if you could polish it up so we can handle that new
>fangled
>GCC "feature" nicely.
>
>Alternatively file a bug report to the GCC folks :)
>
>But seriously I think it's not completely insane what they are doing
>and
>the table based approach is definitely more readable and maintainable
>than
>the existing stuff.
>
>Thanks,
>
>	tglx

Doing this table based does seem like a good idea.
-- 
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