From: sashiko-bot@kernel.org
To: "Heiko Carstens" <hca@linux.ibm.com>
Cc: "Vasily Gorbik" <gor@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH 1/4] s390/percpu: Use asm_inline for arch_this_cpu_add()
Date: Mon, 12 Oct 2026 11:46:06 +0000 [thread overview]
Message-ID: <sashiko-outbox-168026@kernel.org> (raw)
In-Reply-To: <20261012114249.2898572-2-hca@linux.ibm.com>
> When converting to preemptible percpu operations the arch_this_cpu_add()
> inline assemblies were not converted to use asm_inline instead of a plain
> asm statement.
>
> With all the macro usage the inline assemblies grow significantly, and
> the compiler may decide to not inline even small functions. This can be
> observed with gcc16 and a defconfig build where many calls to
> __srcu_read_lock_fast() are not inlined anymore, even though it is
> basically only a this_cpu_inc().
>
> Use asm_inline to address this.
>
> Fixes: 18ec6c5d7ec6 ("s390/percpu: Use new percpu code section for arch_this_cpu_add()")
> 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/20261012114249.2898572-1-hca@linux.ibm.com?part=1
next prev parent reply other threads:[~2026-10-12 11:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 11:42 [PATCH 0/4] s390/percpu: More small improvements Heiko Carstens
2026-10-12 11:42 ` [PATCH 1/4] s390/percpu: Use asm_inline for arch_this_cpu_add() Heiko Carstens
2026-10-12 11:46 ` sashiko-bot [this message]
2026-10-12 12:41 ` Alexander Gordeev
2026-10-12 11:42 ` [PATCH 2/4] s390/percpu: Drop unused output register from arch_this_cpu_add() Heiko Carstens
2026-10-12 11:51 ` sashiko-bot
2026-10-12 13:24 ` Alexander Gordeev
2026-10-12 14:16 ` Heiko Carstens
2026-10-12 14:34 ` Alexander Gordeev
2026-10-12 11:42 ` [PATCH 3/4] s390/percpu: Drop unused output register from arch_this_cpu_to_op() Heiko Carstens
2026-10-12 11:54 ` sashiko-bot
2026-10-12 12:18 ` Heiko Carstens
2026-10-12 14:35 ` Alexander Gordeev
2026-10-12 11:42 ` [PATCH 4/4] s390/percpu: Implement this_cpu_try_cmpxchg() Heiko Carstens
2026-10-12 11:51 ` sashiko-bot
2026-10-12 15:11 ` Alexander Gordeev
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