From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3BA4544A3E2 for ; Mon, 21 Sep 2026 08:52:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789980734; cv=none; b=jYfAw/2wy9fYN8iFTlQWANxPM+ce6ZKOZHPF50amRc4gMtgKpCcw8WHH3NcHluPA1LP9dQUsmn7dUpBoX53deIOn1gO6MzyEvUoL/WTQTpeCLvwdGD5rInMpiin1BIkdp4ThWPDw+l+MkC2oBL8UQPj4KTwQXM0AxXL0BXBMkcU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789980734; c=relaxed/simple; bh=O83/3oBg+JDUuaRVNJ+OSDm7OB3P8SBjValF+Pla8qY=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=FJz/XLC26EnRfMYyCfVfH3KgpdxTi59JsdP9lNt83XOPBUmhWdWnzy8meqzLCq1KVmZLwKJDw9lraLzPhy3KPbKCUVAV17VqfZJZCCVIKA1ceaelRjpaZln0mP+Ur9KGsP0r6Gl6L6h7CVUq/5ZhasU+cpktB5s2IDL5X5xbvuI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AnAWkGyY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AnAWkGyY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6EF7C1F000FF; Mon, 21 Sep 2026 08:52:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789980732; bh=O83/3oBg+JDUuaRVNJ+OSDm7OB3P8SBjValF+Pla8qY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=AnAWkGyY5CqKcX5YjT4t/CV1r0JXNqteOpmIy1xQDePaLdNyoMhdLvpQiAWFVa560 rEXBJWQPitdDlwAz6IJG8G9lj4DnmCtCRkKzj1AAOcwztKv+bUBxLQ73lZYx5jBSVE JMEL+jKWW7dAvuPw2SyQ8a6sP59ThFzUNLMFo4msLXhis0tBx8smCvwwBrbGicR8y9 AAYsXVUzcWL1G0yaM5/wGWVb9fBD5qQYhooa3xixP2re+TYz81TxlHHlvyHLpYCEAN cJmiQ7X8ozbi29QsF3inb9xI5DTDj/pXr99jLobaf5FUexpfwh7Aya4iyGuYwh6yrK n+fLK23IjNQsg== From: sashiko-bot@kernel.org Subject: Re: [PATCH v3 10/11] s390/percpu: Use percpu code section for this_cpu_cmpxchg() Reply-To: sashiko-reviews@lists.linux.dev To: "Heiko Carstens" Cc: "Heiko Carstens" , linux-s390@vger.kernel.org, "Alexander Gordeev" , "Christian Borntraeger" , "Vasily Gorbik" In-Reply-To: <20260921084005.4022574-11-hca@linux.ibm.com> References: <20260921084005.4022574-1-hca@linux.ibm.com> <20260921084005.4022574-11-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 21 Sep 2026 08:52:11 +0000 Message-Id: <20260921085212.6EF7C1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Convert this_cpu_cmpxchg() to make use of percpu code section > functionality in order to get rid of preempt_disable() and > preempt_enable() calls. >=20 > 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. >=20 > Signed-off-by: Heiko Carstens Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260921084005.4022= 574-1-hca@linux.ibm.com?part=3D10