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From: Thomas Gleixner <tglx@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>, Arnd Bergmann <arnd@kernel.org>, Will
 Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>, Joerg
 Roedel <joro@8bytes.org>, Andrew Morton <akpm@linux-foundation.org>
Cc: linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
 linux-kernel@vger.kernel.org, Sebastian Andrzej Siewior
 <bigeasy@linutronix.de>
Subject: Re: [PATCH 1/2] [RFC] debugobjects: avoid gcc-16.0.1 section mismatch
In-Reply-To: <34af0db2-7a04-4119-925f-3aa3e3ecb683@app.fastmail.com>
References: <20260203162406.2215716-1-arnd@kernel.org> <874ikf9i34.ffs@tglx>
 <d52dcd45-959a-4ff4-9e82-0bae133785f1@app.fastmail.com>
 <87y0hq8lcu.ffs@tglx>
 <34af0db2-7a04-4119-925f-3aa3e3ecb683@app.fastmail.com>
Date: Mon, 11 May 2026 18:10:37 +0200
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On Mon, May 11 2026 at 11:46, Arnd Bergmann wrote:
> On Mon, May 11, 2026, at 09:18, Thomas Gleixner wrote:
>> I agree that the compiler does not know what __init means, but this
>> sucks as it leaves an unused copy of lookup_object_or_alloc() around
>> after init.
>>
>> What happens if you mark is_static_object() with 'noinline'?
>
> I've reproduced the issue with the release gcc-16.1.0 build,
> and tested marking is_static_object (along with
> dummy_tlb_add_page and dummy_tlb_flush from the other
> instance) as noinline.
>
> As expected, this avoids the problem as well.

I rather prefer that along with a comment explaining the 'noinline' oddity.