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 B6F634D9562 for ; Mon, 21 Sep 2026 16:34:41 +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=1790008483; cv=none; b=shSU0KcCOd7aL7Ut4BJdEx37zMtP1OuDKltIYoilLh5cH53zOgxgePCknXsjsEA9mBgqxk5TCGKYYPtG8vDCNjcyozL9SI4NnNeS5rO6QRXLAINQ49vtR685r4qgk59k3BO3XsKpqihZv3rSZENKobUVmAx8jQdwZAGIJAqstzo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790008483; c=relaxed/simple; bh=2OSSsS37ibJaAAWTLZwQbzqFvRMpm8D4zZOeuZgZfgU=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=ifWJ+HyvTxqEuSl7W2TE5E4KukQQyj0gM/7MlvhZbPEqu2j4vDeT0AL0ng5/MLISaXHgrxk0h1wN9A6IscuMLE0kdsSwvB2dWH573G1njAEjpaGsJauqgEeoxQucxyOBzTaYG7JyzG/ZotgzTegYfs4DEBnRmwTXy9morRWmmWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jGKYKqZT; 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="jGKYKqZT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B7611F00893; Mon, 21 Sep 2026 16:34:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790008481; bh=2OSSsS37ibJaAAWTLZwQbzqFvRMpm8D4zZOeuZgZfgU=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=jGKYKqZTqxXdr+pBFS2vY2ca6n5/jgc0I9uByDifOwTfGQElJLQvOUfNw2PiduIwQ j2wefBYj/0Dwf4TZQ6OkcCjmVsZFqFCZzQXQ+sOWmEXyes1KtTtkqV6KApBcT74UsK S3U0iFnYRILZVmNXvfIEKcO0VDWuBIgDKHcfm9ojhGdePOyhqF4IDLLXUwfQ3VSG17 ymLNV04kJm788W15ZhwDGOYRPcJR66+qMrpMNW9CliQ8U8tywpBKlLfSpms9bVUDo8 Wz8qMOsdBruCckbkTAII8f7R05fFbC0RoFqZXbqEvsoKPm4Ws9fCPeH7cSl/MWQiku cSS8YCA0LKNBg== From: sashiko-bot@kernel.org Subject: Re: [PATCH v4 09/11] s390/percpu: Use percpu code section for this_cpu_xchg() Reply-To: sashiko-reviews@lists.linux.dev To: "Heiko Carstens" Cc: "Christian Borntraeger" , "Vasily Gorbik" , "Heiko Carstens" , "Alexander Gordeev" , linux-s390@vger.kernel.org In-Reply-To: <20260921155806.2447506-10-hca@linux.ibm.com> References: <20260921155806.2447506-1-hca@linux.ibm.com> <20260921155806.2447506-10-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 21 Sep 2026 16:34:40 +0000 Message-Id: <20260921163441.0B7611F00893@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 no 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/20260921155806.2447= 506-1-hca@linux.ibm.com?part=3D9