From: sashiko-bot@kernel.org
To: "Heiko Carstens" <hca@linux.ibm.com>
Cc: "Heiko Carstens" <hca@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
linux-s390@vger.kernel.org,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>
Subject: Re: [PATCH 10/12] s390/percpu: Use percpu code section for this_cpu_cmpxchg()
Date: Thu, 17 Sep 2026 19:31:27 +0000 [thread overview]
Message-ID: <20260917193127.B3BE41F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260917192237.638324-11-hca@linux.ibm.com>
> Convert this_cpu_cmpxchg() to make use of percpu code section
> functionality in order to get rid of preempt_disable() and
> preempt_enable() calls.
>
> Consider only four and eight byte usages, since there are no compare
> and swap instructions for one and two bytes available. For one and
> two bytes use the previous simple implementation.
>
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260917192237.638324-1-hca@linux.ibm.com?part=10
next prev parent reply other threads:[~2026-09-17 19:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-17 19:22 [PATCH 00/12] s390: More this_cpu_*() changes Heiko Carstens
2026-09-17 19:22 ` [PATCH 01/12] s390/percpu: Fix comment typo Heiko Carstens
2026-09-17 19:24 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 02/12] s390/percpu: Add sanity check to GEN_MVIY macro Heiko Carstens
2026-09-17 19:26 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 03/12] s390/lowcore: Remove _AC() from LOWCORE_ALT_ADDRESS Heiko Carstens
2026-09-17 19:29 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 04/12] s390/percpu: Let MVIY_PERCPU() calculate alternative displacement Heiko Carstens
2026-09-17 19:29 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 05/12] s390/percpu/lowcore: Add and use LC_PERCPU lowcore offset defines Heiko Carstens
2026-09-17 19:27 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 06/12] s390/percpu: Rename inline assembly symbolic names Heiko Carstens
2026-09-17 19:25 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 07/12] s390/percpu: Use __PCPU_BEGIN() and __PCPU_END() for inline assemblies Heiko Carstens
2026-09-17 19:26 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 08/12] s390/percpu: Use percpu code section for this_cpu_cmpxchg128() Heiko Carstens
2026-09-17 19:29 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 09/12] s390/percpu: Use percpu code section for this_cpu_xchg() Heiko Carstens
2026-09-17 19:30 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 10/12] s390/percpu: Use percpu code section for this_cpu_cmpxchg() Heiko Carstens
2026-09-17 19:31 ` sashiko-bot [this message]
2026-09-17 19:22 ` [PATCH 11/12] s390: Add CC_HAS_ASM_M_FORMAT_FLAG config option Heiko Carstens
2026-09-17 19:32 ` sashiko-bot
2026-09-17 19:22 ` [PATCH 12/12] s390/percpu: Rework to simplify percpu_entry() and percpu_exit() Heiko Carstens
2026-09-17 19:42 ` sashiko-bot
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