linux-kernel - Re: [PATCH v2 01/14] kasan: sw_tags: Use arithmetic shift for shadow computation

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Message-ID: <CA+fCnZfb_cF1gbASZsi6Th_zDwXqu4KMtRUDxbsyfnyCfyUGfQ@mail.gmail.com>
Date: Tue, 25 Feb 2025 22:37:58 +0100
From: Andrey Konovalov <andreyknvl@...il.com>
To: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
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Subject: Re: [PATCH v2 01/14] kasan: sw_tags: Use arithmetic shift for shadow computation

On Tue, Feb 25, 2025 at 6:21 PM Maciej Wieczor-Retman
<maciej.wieczor-retman@...el.com> wrote:
>
> >> I wanted to have the shadow memory boundries aligned properly, to not waste page
> >> table entries, so the memory map is more straight forward. This patch helps with
> >> that, I don't think it would have worked without it.
> >
> >Ok, I see - let's add this info into the commit message then.
>
> Sure, but if you like the 0xffeffc0000000000 offset I'll just drop this part.

Sure, assuming it works, I like this address :) But to be fair, I like
any fixed address better than using a runtime const, just to avoid the
complexity.