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 7A3BC49D59F for ; Thu, 17 Sep 2026 19:30:52 +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=1789673453; cv=none; b=IKIZbKQ9E+QPUnO1Eq9cUILVV8dsF2J2Pjy7lIKNry9NHJfiGsrSLGBZZITSxcx94NSKKf1OBNMY2xX/EJnz21yoyBGLC3cWrChltrQ0EupmGJg/MDmW/r4o7FU1WMwMWimAnx4cd6VyN/Y805FqFVyO8uOyfdKSyHFurZCN4gE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789673453; c=relaxed/simple; bh=RC0KiXDQRb6MLDwNs2FSQmh1hxenOUmNjjRQlU0FVTo=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=p61kwayiMjFnd6TrhdJvYSpjFvdjVY7SpAWEmypeW1fvwXibqHVIxHhoWM14ukAKiuvM/h78drerdV8UA2D1hrfetzi2+BJZq79/Iq2zGt9OcLXu96XoVL6n4gvWzBEeuULDjHFdUuB/r/qL4QnLrqvuS54sa1jcMIsUpsuCVvs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GcRhV3rn; 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="GcRhV3rn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA06B1F000FF; Thu, 17 Sep 2026 19:30:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789673452; bh=RC0KiXDQRb6MLDwNs2FSQmh1hxenOUmNjjRQlU0FVTo=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=GcRhV3rn88g/hinbIKcu/hXUczO9fCaj3JZbcJ2DzVhG5kLSZQRVqY0sZrFiZTRaJ 8YOlIscs3EkidpO2S/LtH+0P8mojLJ6grKwJYVz3wgP8vbU8Q8JY6RopKyu0Vvu4dD tKIUlHWj3x84GRrjUDU0FiynlBJNGKsusPXsuS887SCZL7uWomPpbgNduDeLNf7QeB n+xqiIqis6954XS4SXWpFdEgkFA27CUhg/MqIpTK5keunKidConauuKZOGEiNbXyaJ WM+g3WRU9nvflxP5MKeZ7T2GT4ZAaE8UTdI9JZ/OH2USzMYIk32gBvWCc+twmEjiS5 OObgNsvp+yY8g== From: sashiko-bot@kernel.org Subject: Re: [PATCH 09/12] s390/percpu: Use percpu code section for this_cpu_xchg() Reply-To: sashiko-reviews@lists.linux.dev To: "Heiko Carstens" Cc: linux-s390@vger.kernel.org, "Alexander Gordeev" , "Vasily Gorbik" , "Heiko Carstens" , "Christian Borntraeger" In-Reply-To: <20260917192237.638324-10-hca@linux.ibm.com> References: <20260917192237.638324-1-hca@linux.ibm.com> <20260917192237.638324-10-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 17 Sep 2026 19:30:51 +0000 Message-Id: <20260917193051.BA06B1F000FF@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/20260917192237.6383= 24-1-hca@linux.ibm.com?part=3D9