From: "Arnd Bergmann" <arnd@kernel.org>
To: "Akari Tsuyukusa" <akkun11.open@gmail.com>,
"Nick Desaulniers" <ndesaulniers@google.com>
Cc: "Matthias Brugger" <matthias.bgg@gmail.com>,
"AngeloGioacchino Del Regno"
<angelogioacchino.delregno@collabora.com>,
"Russell King" <linux@armlinux.org.uk>,
"Nathan Chancellor" <nathan@kernel.org>,
"Bill Wendling" <morbo@google.com>,
"Justin Stitt" <justinstitt@google.com>,
"Yingjoe Chen" <yingjoe.chen@mediatek.com>,
"moderated list:ARM SUB-ARCHITECTURES"
<linux-arm-kernel@lists.infradead.org>,
"open list:ARM/Mediatek SoC support"
<linux-kernel@vger.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>,
"open list:CLANG/LLVM BUILD SUPPORT:Keyword:b(?i:clang|llvm)b"
<llvm@lists.linux.dev>,
stable@vger.kernel.org, "Ard Biesheuvel" <ardb@google.com>
Subject: Re: [PATCH] arm: mediatek: fix secondary CPU boot on Thumb-2 kernels with Clang
Date: Thu, 23 Jul 2026 11:53:14 +0200 [thread overview]
Message-ID: <ef007a23-46bd-41d6-83ff-264831341093@app.fastmail.com> (raw)
In-Reply-To: <amHYO1c-5vzqSekt@buffalo-ssd>
On Thu, Jul 23, 2026, at 11:15, Akari Tsuyukusa wrote:
> On Wed, Jul 22, 2026 at 02:03:31PM -0700, Nick Desaulniers wrote:
>> On Wed, Jul 22, 2026 at 10:25 AM Akari Tsuyukusa <akkun11.open@gmail.com> wrote:
>> Can you perhaps help test/verify that Akari?
>
> I tested your suggested patch and confirmed that it fixes the issue.
>
> Device: Lenovo YOGA Tablet 10 (Wi-Fi) (MT8125)
> Toolchain: Clang/LLVM 22.1.8-2 (cachyos-v3)
>
> Tested-by: Akari Tsuyukusa <akkun11.open@gmail.com>
>
> Can you send your fix as PATCH?
> I think your approach is better than mine.
I think we should wait for the llvm issue to be resolved first, to
document whether this is considered a bug in the kernel or the
assembler, and to see if any other kernel code may be affected
by the same thing.
Looking around other .S files, I see the same
pattern in stext(), cpu_resume_arm(), mcpm_entry_point(),
all of which start in arm mode but end in thumb.
Arnd
prev parent reply other threads:[~2026-07-23 9:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-22 17:24 [PATCH] arm: mediatek: fix secondary CPU boot on Thumb-2 kernels with Clang Akari Tsuyukusa
2026-07-22 21:03 ` Nick Desaulniers
2026-07-23 4:45 ` Roman Vivchar
2026-07-23 9:15 ` Akari Tsuyukusa
2026-07-23 9:53 ` Arnd Bergmann [this message]
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