From: Peter Zijlstra <peterz@infradead.org>
To: Finn Thain <fthain@linux-m68k.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Will Deacon <will@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
Mark Rutland <mark.rutland@arm.com>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-m68k@lists.linux-m68k.org, Sasha Levin <sashal@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ard Biesheuvel <ardb@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH v7 3/4] atomic: Add alignment check to instrumented atomic operations
Date: Wed, 14 Jan 2026 14:07:03 +0100 [thread overview]
Message-ID: <20260114130703.GC830755@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <51ebf844e006ca0de408f5d3a831e7b39d7fc31c.1768281748.git.fthain@linux-m68k.org>
On Tue, Jan 13, 2026 at 04:22:28PM +1100, Finn Thain wrote:
> From: Peter Zijlstra <peterz@infradead.org>
>
> Add a Kconfig option for debug builds which logs a warning when an
> instrumented atomic operation takes place that's misaligned.
> Some platforms don't trap for this.
>
> [ fthain: added __DISABLE_EXPORTS conditional and refactored as helper
> function. ]
>
> Cc: Sasha Levin <sashal@kernel.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: Ard Biesheuvel <ardb@kernel.org>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Link: https://lore.kernel.org/lkml/20250901093600.GF4067720@noisy.programming.kicks-ass.net/
> Link: https://lore.kernel.org/linux-next/df9fbd22-a648-ada4-fee0-68fe4325ff82@linux-m68k.org/
> Signed-off-by: Finn Thain <fthain@linux-m68k.org>
>
> ---
> Checkpatch.pl says...
> ERROR: Missing Signed-off-by: line by nominal patch author 'Peter Ziljstra <peterz@infradead.org>'
Feel free to add:
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
next prev parent reply other threads:[~2026-01-14 13:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-13 5:22 [PATCH v7 0/4] Align atomic storage Finn Thain
2026-01-13 5:22 ` [PATCH v7 4/4] atomic: Add option for weaker alignment check Finn Thain
2026-01-13 5:22 ` [PATCH v7 1/4] bpf: Explicitly align bpf_res_spin_lock Finn Thain
2026-01-13 5:22 ` [PATCH v7 3/4] atomic: Add alignment check to instrumented atomic operations Finn Thain
2026-01-13 7:56 ` Geert Uytterhoeven
2026-01-14 3:53 ` Finn Thain
2026-01-16 0:27 ` Andrew Morton
2026-01-14 13:07 ` Peter Zijlstra [this message]
2026-01-13 5:22 ` [PATCH v7 2/4] atomic: Specify alignment for atomic_t and atomic64_t Finn Thain
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