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 9CC1448592C for ; Fri, 18 Sep 2026 08:55:57 +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=1789721759; cv=none; b=Ih8RysfocwM/DWc3bdiRjtx/Nnv63OrZCrt7uYMSzRw6Gz8gWfpqFiYk4q9VzlC/+5spz37bMIWMdI3P5okgyJ3/8aEmPch/wSDjmXsA0DWTSLTq3Loiub9LTjyThrLqBsp1nORBbmKDOtqP2jAeoKlOHUlPVhpUldaeIStvrAg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789721759; c=relaxed/simple; bh=EDT+TN6DYWRn25W0aV4pGPYu0AsSZXtu1ERc+bfv3Ps=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=VE1i8Tx5p4sth6K1zCll1kMU7gVpGTtKIra/TzKVwlEqg/w7f/AvUneGhaABUoNCDfMgllIhY1A1MIGNH9iprODZjLSY3S4CSy5RbodNHvENwu8PSVuNJy3y/Dt7X5Q6bpjxBwmRP2gn/+1xTBdV7MSdPKmH+2vdWWzKY2Df6cI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GlFwbwMU; 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="GlFwbwMU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E64CB1F000FF; Fri, 18 Sep 2026 08:55:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789721757; bh=EDT+TN6DYWRn25W0aV4pGPYu0AsSZXtu1ERc+bfv3Ps=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=GlFwbwMUrJXpTOsN4V8HTb/cKn08OIZiaD9LN5V4QGyh7LQr/XPFQFtILdZrKoSHU 7KA+5iLcThPg+hEC3CkT6AjQyUNe85K46f8KSMdheEP/+jqcMJv4ZRgObBSNoLGMhk zjIF0MC6MBBz6KYxlmL2Q81PA1CNrZ1SgutOUy09V2l80s9fFKPZj+5Xr490Odrjqo 1K698Mm0UKOTiFnVQi1EwAkQ1RzlzSEslI5kk0eli6KZdXTWPscIA8HSsFUUUPjYkH FmtLQfKdOUQp5SSCHciY8ABANLBBDsRRTKVFtEekY4RgUpovTZLzkLuTLJ77zpxlJd rnF7OIJf24iOA== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 10/12] s390/percpu: Use percpu code section for this_cpu_cmpxchg() Reply-To: sashiko-reviews@lists.linux.dev To: "Heiko Carstens" Cc: "Christian Borntraeger" , "Heiko Carstens" , linux-s390@vger.kernel.org, "Vasily Gorbik" , "Alexander Gordeev" In-Reply-To: <20260918084842.2333237-11-hca@linux.ibm.com> References: <20260918084842.2333237-1-hca@linux.ibm.com> <20260918084842.2333237-11-hca@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 18 Sep 2026 08:55:56 +0000 Message-Id: <20260918085556.E64CB1F000FF@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/20260918084842.2333= 237-1-hca@linux.ibm.com?part=3D10