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 53E173F7A9F for ; Mon, 21 Sep 2026 08:45:56 +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=1789980358; cv=none; b=LZC1u4VfWaZEzvVo7z0Yd0zyV4xjfjYEfASm4Hyv9blSL3LFGykxAeM/cpldidYDzaMsGY7cCQ6BrBwxwsz0aEKTQEoAg2xvKeJVZ6fO7aiCxAZ8zPBudf2HrKFPDf+H1k61dGdHWPQGG66vRgbyO4psfzoU7yzBK5KcCPu7adI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789980358; c=relaxed/simple; bh=p6mwSX8qibiwrn+hxz73nwt6fOBgyLUBZS2iO2HP8RU=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=iJerJjwu58bpY+3lE04kdLBaFOhkY3NdAwQltpIJluaWPiFeGubQjcXg0IPdYymyXP0ziW1nHZNG5OwHzRz6E0G7GxnsLEEr+TbKUgy14raRUT4f/rpzFlnNU19wHRJKI+L/CGUaU5Y519obiu4HMLsdIHF6MIULeCnD5OWhzMw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BEEMZjFt; 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="BEEMZjFt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 502351F00898; Mon, 21 Sep 2026 08:45:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789980356; bh=p6mwSX8qibiwrn+hxz73nwt6fOBgyLUBZS2iO2HP8RU=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=BEEMZjFti+UxkoWYnuVbGBaXPAikEyjYERR/cMEQpKNPQdD0V4n3sg5SbfyUybzZY +BK5Gqo3fgysTpod0k+NMSwkh0Mr1eoun769TAiuocrl+Dwzl/uOTRpEGXTmp8FQL8 ffN2H1KqUvC0ja8i8wrnbHmpLFv7nAB5EYOsT2EHHSZzBohEDvzDh58NkXkKLCjztN dNo+cRnbEV/U2d9cjmOPZVUz+kG/RkxcrEd/Q/G74VI0mXqqWt0iKOsPLHx7Xs5scX E/n0WlKEVzcUSqOC8k8qUEEOAR9SGe4RqazHj/oHJ15s7SE9bXFaKwnCphVRELRqqH 6yYFIylyc1TIQ== From: sashiko-bot@kernel.org Subject: Re: [PATCH v3 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" , linux-s390@vger.kernel.org, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" In-Reply-To: <20260921084005.4022574-10-hca@linux.ibm.com> References: <20260921084005.4022574-1-hca@linux.ibm.com> <20260921084005.4022574-10-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 21 Sep 2026 08:45:55 +0000 Message-Id: <20260921084556.502351F00898@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/20260921084005.4022= 574-1-hca@linux.ibm.com?part=3D9