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 D145D48D868 for ; Mon, 21 Sep 2026 16:42:32 +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=1790008953; cv=none; b=WRbOyqW4I5/0zw1Y2CC0ZiRwkvjFsxC0WU/mHwJsh4g/mEkzx4TC6UZmzhzF2EmvtBX1uuVwZTGGN0MPuioKydvRf/mbvtU6Qai5/SnJiSl1bOIVIdlS3AOuMuWYxj6SKac3ali8zZK79yMnAQde4+ynoBhuyNuJ1qvu7/xCIzc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790008953; c=relaxed/simple; bh=fd4MMC4SXqPqvUJEBSEGn6gCMs+HXqCabp5VEqkA55U=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=m9YckclrCJLA6lAiYJVjHiejVxn0QT9qbXnU5kp36wQE4BgRVcCDyw/5gIUJ8pAr5m0MH6zzmG77wKLZpmGyZEr7/T3A9BkkRVilJdUoHHYdWDN/0mlF4Axga1eeJBRze33nawNDDsYIxsKgCU70k9Nkakua5hcHSzF5N19/k/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JfTNUIPO; 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="JfTNUIPO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0AFD61F000FF; Mon, 21 Sep 2026 16:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790008952; bh=fd4MMC4SXqPqvUJEBSEGn6gCMs+HXqCabp5VEqkA55U=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=JfTNUIPOhiAY3Za9bXDtlEltgBT+M4PPGMwUeWeih39RKp1Ts37GTkUAGukFdCOtM wtAzkRG392cuIKTvtFTZ4XerS0ibgzPEUZKiiIRCfX2ahuNLSunelAIoKpEOlHYDSc WHgX56F5fJmow4Y5FmIHYGVrajtuX9LLy4Db4+adsdvV7ou1wBHpJdqg7zATVH8Hmy ByyBfCeWpMpSXPMLdUX1An466eKQzoCcnFUlFriha09E6R6MQndiEuuUOodYa1CivW wtKlUHDGotkHphjUENLXPARcyQ3rBRRuetaWu2sdhYwGwS5WtOtMcX1yPHK98koanh 66otWhORjxslQ== From: sashiko-bot@kernel.org Subject: Re: [PATCH v4 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, "Vasily Gorbik" , "Alexander Gordeev" , "Christian Borntraeger" In-Reply-To: <20260921155806.2447506-11-hca@linux.ibm.com> References: <20260921155806.2447506-1-hca@linux.ibm.com> <20260921155806.2447506-11-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 21 Sep 2026 16:42:31 +0000 Message-Id: <20260921164232.0AFD61F000FF@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/20260921155806.2447= 506-1-hca@linux.ibm.com?part=3D10