linux-kernel - Re: [PATCH v4 18/24] EDAC/amd64: Define function to insert CS ID into address

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Message-ID: <YikqxFfS9qrLLXM4@yaz-ubuntu>
Date:   Wed, 9 Mar 2022 22:31:32 +0000
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        mchehab@...nel.org, tony.luck@...el.com, james.morse@....com,
        rric@...nel.org, Smita.KoralahalliChannabasappa@....com
Subject: Re: [PATCH v4 18/24] EDAC/amd64: Define function to insert CS ID
 into address

On Mon, Feb 14, 2022 at 02:09:07PM +0100, Borislav Petkov wrote:
> On Thu, Jan 27, 2022 at 08:41:09PM +0000, Yazen Ghannam wrote:
> > @@ -1326,20 +1331,7 @@ static int denormalize_addr(struct addr_ctx *ctx)
> >  		return -EINVAL;
> >  	}
> >  
> > -	if (num_intlv_bits > 0) {
> > -		u64 temp_addr_i;
> > -
> > -		/*
> > -		 * The pre-interleaved address consists of XXXXXXIIIYYYYY
> > -		 * where III is the ID for this CS, and XXXXXXYYYYY are the
> > -		 * address bits from the post-interleaved address.
> > -		 * "num_intlv_bits" has been calculated to tell us how many "I"
> > -		 * bits there are. "intlv_addr_bit" tells us how many "Y" bits
> > -		 * there are (where "I" starts).
> > -		 */
> 
> That comment looks useful, why remove it?
>

No firm reason. I just got the feeling it wasn't very useful. But I'll keep it
in case others find it helpful.

Thanks,
Yazen