linux-kernel - Re: [PATCH v2 08/14] powerpc: Handle KCOV _

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Message-ID: <6E407BC0-4D84-4420-AE07-EF85EBA1AB1C@kernel.org>
Date: Fri, 23 May 2025 08:15:49 -0700
From: Kees Cook <kees@...nel.org>
To: Andrew Donnellan <ajd@...ux.ibm.com>, Arnd Bergmann <arnd@...db.de>
CC: Madhavan Srinivasan <maddy@...ux.ibm.com>,
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
 Christophe Leroy <christophe.leroy@...roup.eu>,
 Naveen N Rao <naveen@...nel.org>,
 "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
 "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
 Andrew Morton <akpm@...ux-foundation.org>, linuxppc-dev@...ts.ozlabs.org,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>,
 Christoph Hellwig <hch@....de>, Marco Elver <elver@...gle.com>,
 Andrey Konovalov <andreyknvl@...il.com>,
 Andrey Ryabinin <ryabinin.a.a@...il.com>, Ard Biesheuvel <ardb@...nel.org>,
 Masahiro Yamada <masahiroy@...nel.org>,
 Nathan Chancellor <nathan@...nel.org>,
 Nicolas Schier <nicolas.schier@...ux.dev>,
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Subject: Re: [PATCH v2 08/14] powerpc: Handle KCOV __init vs inline mismatches

On May 22, 2025 10:24:30 PM PDT, Andrew Donnellan <ajd@...ux.ibm.com> wrote:
>On Thu, 2025-05-22 at 21:39 -0700, Kees Cook wrote:
>> When KCOV is enabled all functions get instrumented, unless
>> the __no_sanitize_coverage attribute is used. To prepare for
>> __no_sanitize_coverage being applied to __init functions, we have to
>> handle differences in how GCC's inline optimizations get resolved.
>> For
>> s390 this requires forcing a couple functions to be inline with
>
>I assume you mean powerpc here, though I'm sure my employer is happy
>that you're at least confusing us with IBM's other architecture :)

Whoops! Yes. Paste-o on my part. The rest of the sentence was updated correctly though. :)

-- 
Kees Cook