linux-kernel - Re: [PATCH v3 3/3] asm-generic, x86: Add bitops instrumentation for KASAN

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Message-ID: <5b4babdb-dfae-4006-0608-a9f5814e89e9@virtuozzo.com>
Date:   Thu, 13 Jun 2019 13:51:23 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Marco Elver <elver@...gle.com>, peterz@...radead.org,
        dvyukov@...gle.com, glider@...gle.com, andreyknvl@...gle.com,
        mark.rutland@....com, hpa@...or.com
Cc:     corbet@....net, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        x86@...nel.org, arnd@...db.de, jpoimboe@...hat.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, kasan-dev@...glegroups.com
Subject: Re: [PATCH v3 3/3] asm-generic, x86: Add bitops instrumentation for
 KASAN



On 5/31/19 6:08 PM, Marco Elver wrote:
> This adds a new header to asm-generic to allow optionally instrumenting
> architecture-specific asm implementations of bitops.
> 
> This change includes the required change for x86 as reference and
> changes the kernel API doc to point to bitops-instrumented.h instead.
> Rationale: the functions in x86's bitops.h are no longer the kernel API
> functions, but instead the arch_ prefixed functions, which are then
> instrumented via bitops-instrumented.h.
> 
> Other architectures can similarly add support for asm implementations of
> bitops.
> 
> The documentation text was derived from x86 and existing bitops
> asm-generic versions: 1) references to x86 have been removed; 2) as a
> result, some of the text had to be reworded for clarity and consistency.
> 
> Tested: using lib/test_kasan with bitops tests (pre-requisite patch).
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198439
> Signed-off-by: Marco Elver <elver@...gle.com>

Reviewed-by: Andrey Ryabinin <aryabinin@...tuozzo.com>