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 B5DE7470EB6 for ; Fri, 18 Sep 2026 08:56:08 +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=1789721770; cv=none; b=iz4OTwFHmzgSWZd6xQDQNJ/K8qq2r5ME16i+yi2ykTdBltceEB8tCyG1+jdDExUNLfLqRkXZ1ReLbOVU698ZiYWZ2g93E5f2uJmNEiM2KCmjRkbhI/nNjdjrD1ey6HfOUlYFDTPS9CeKJVlYy7x0rdp1EaO6fIzlDXoCy0Boz7A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789721770; c=relaxed/simple; bh=R7OWc+rLubdTU/vFhGdcx8lPtCxdS96MA5p/SxFCxcI=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=osrKt20rQPpAtmdhxRc+G5v9iWv2o5PigFZpT7wt9uCpAyHaI9XcuSo8quGSKaZ+9MBvurMw5CZW/PE0bclVqoWxKl4TRW2H3Ws1hZtTdhm01dlYixWxEXzD0LdzVX0agGs39It0LK1E5LgQZdnpNKnsj0eoJrZBaXO0x3LgY2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gkGVugZi; 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="gkGVugZi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DFF011F000FF; Fri, 18 Sep 2026 08:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789721768; bh=R7OWc+rLubdTU/vFhGdcx8lPtCxdS96MA5p/SxFCxcI=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=gkGVugZiXQheETNvGdAEJo0OM2W8WufOnXYTSWufJyorOLXS3cNPguVXFTTr3S7Yd 20xy9nbjT0bjamkdKAz3soHfIfcZQ1tE8LRMIgBhHByTtmXAiGDsz60fhJ05Ygyt+w GcqF7RwNhYODrmjw8mQB+iGP3sHKit4VIlms1ATJqWiOKeoDkkO3W1lWC0Wvc6kHhp Y+m/OyErophMQoDCwVz8eS/0v/rz935C+ookP/DIyD3EDvYsRAkaQXmAkgz6VaKxlw MhODN5umwt6E+4IpQ/EP8ikhd+rhGgOQhTI1LWOV3bhoqVGo7j63zPwH6kvJPm8yDy pHDaOE9hPed8A== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 09/12] s390/percpu: Use percpu code section for this_cpu_xchg() Reply-To: sashiko-reviews@lists.linux.dev To: "Heiko Carstens" Cc: "Christian Borntraeger" , linux-s390@vger.kernel.org, "Alexander Gordeev" , "Heiko Carstens" , "Vasily Gorbik" In-Reply-To: <20260918084842.2333237-10-hca@linux.ibm.com> References: <20260918084842.2333237-1-hca@linux.ibm.com> <20260918084842.2333237-10-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 18 Sep 2026 08:56:07 +0000 Message-Id: <20260918085607.DFF011F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Convert this_cpu_xchg() 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 compare and > swap instructions for one and two bytes available. For one and two > byte 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/20260918084842.2333= 237-1-hca@linux.ibm.com?part=3D9