From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=148.163.156.1 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793190269; b=aDNN63YTMnAXyehCn+euPHezCnpeIr8tSscS6Qf9ZAktlmvVOyRacxrKfUZiJt/OThHN D7EjMPhcBxO9PDv2jeaYUB1kUwe1QJoZElMbfonPXgt08jDxxPxtIs/Iq5VvI16u6+Sof SSzqwB1lEY9792+musEFvElLgtp7xNhcY8JI5KYjUgmWL+iCthN7gOk+O3hCr/qRUt+Xa hu/1Hlx1p+iT9LkCfMY4BsX8h1D9NvrHsC2MT3sSD/pBDrBRt3hWclwPM5vTpS61PUr3F YLrLb6A0WXp8mo03sdwwds8DfDrNuYylGLseInMy2us65o6+T+bilBUqEFt8vqs3g2g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793190269; h=DMARC-Filter:Received:DKIM-Signature:Received:Received:Received: Received:Received:Received:Received:Message-ID:Date:MIME-Version: User-Agent:Subject:To:Cc:References:Content-Language:From:In-Reply-To: Content-Type:Content-Transfer-Encoding:X-TM-AS-GCONF: X-Proofpoint-Spam-Info:X-Proofpoint-Spam-Details-Enc: X-Proofpoint-ORIG-GUID:X-Authority-Analysis:X-Proofpoint-GUID: X-Proofpoint-Virus-Version:X-Proofpoint-Spam-Details; bh=VkwsenjxlICO21oX9qWYCdyTytlg9Dgl3JAZ7Fjkr0A=; b=BGp6T2gYarRAfIopo1VH0MV2Sc79Mk/IAaBhsQxnbJGfWPYDE9a6hl1u0pn13/TNcg1O lqw1EKF72W6a1BzPGVVcfkOz4WIA9zN1w3ZUZAT1TUkIkCrAwx4qat3Dp41e9/fAqHQZX Nox4YBEiZ7b44hZ7hJsgWlbrywoaP0f4ph1IN19tPeD0PFdQRL1MzilEsKhZVxpuj056B VlofzA60aCqfnQ1Htib45Fh+Vw2V6drQEUyquzRAje3706WacnLtx6ZsNCwDFfv+poim8 Pf2p5G96DqnepOtm/XkmkKvKB1w95ZRspZ+L1+0uHAKO6be6c9GlL7kpof9IFea+Nzw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=VqD55CmN; arc=none smtp.remote-ip=148.163.156.1 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A82C560A2602; Wed, 28 Oct 2026 12:24:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org A82C560A2602 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=VqD55CmN Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 69SBiKoq1346117; Wed, 28 Oct 2026 12:24:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=Vkwsen jxlICO21oX9qWYCdyTytlg9Dgl3JAZ7Fjkr0A=; b=VqD55CmNZhEUkFsrDnbPdo 8UAEjI7NbhOJpC7y0GcPygnXVjOpA/SgQ2rK4xb4Z4v9hjdKUWWEPEoCGNRoQoEl 7PgIOC+Gh60Y4iCM2ds7kBAsSc5loUcGFSZ4i5UeYg6NVP7PqpVgRxZpoFAAmXC9 G5hGTWtoDkrpddfaIQUwfDbNVihKdBpAHGlM0KfSgcuUv3P4gawjIpJF3DHQwv8C nTjkfytbCe2w8ZnyN6fjsYn8hwmF0f+Y7d8y2pTh/E8KyFd2XkFrLQy9uy/AB9oT Id8yi/oaCbnFIVmr+PCRTDgjmqL2CzXdMIALkYanu8SkIxzIol3+qGR/Zx/jt3/A == Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4hgm644md2-1 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Wed, 28 Oct 2026 12:24:27 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.11/8.18.1.11) with ESMTP id 69SBnwMq1501920; Wed, 28 Oct 2026 12:24:27 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4hjsu7w4d4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Oct 2026 12:24:27 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 69SCONMJ53412186 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 28 Oct 2026 12:24:23 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7CBE520043; Wed, 28 Oct 2026 12:24:23 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 434FB20040; Wed, 28 Oct 2026 12:24:23 +0000 (GMT) Received: from [0.0.0.0] (unknown [9.111.73.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 28 Oct 2026 12:24:23 +0000 (GMT) Message-ID: <044018d6-3348-4e44-841a-7eecca8a6b66@linux.ibm.com> Date: Wed, 28 Oct 2026 13:24:23 +0100 X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 07/10] s390/nospec-branch: Serialize text patching with text_mutex To: Heiko Carstens , Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org References: <20261027143030.3154657-1-hca@linux.ibm.com> <20261027143030.3154657-8-hca@linux.ibm.com> Content-Language: en-US From: Ilya Leoshkevich In-Reply-To: <20261027143030.3154657-8-hca@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI4MDA0OCBTYWx0ZWRfX3P0rNuW378PH 1xtwBfQYPVKkc4MZTokgRnYtjXdug7r6Ki9D9qO7TxisSMMs76qjoMAktCbhs87t29WO8NhhUuB SeY1SPFVYsSPYdHNwF2wroOMZhC3Q7s= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI4MDA0OCBTYWx0ZWRfXywYMWRYPrOIr brQpOfqVv3+TNxP2pjztnIYjJmJCKjabQMHWp1DyntFnnFkM4RGHcGZAzGDVABBo5EaQh5bFsZP NrzY6KramC0yeovR1qK+qiJuthvZ3y1JVUO2QnvIaN6uuvACkRRRD4x6yoFDZy9SKQrafrD3qyo V9FCrisSMWg28jzkqY2JqX1uPKLbKyaOdQnuxV/X0n/69Btg3k6jXePVEqbyF9Nl4f2omL/UexC 5J8Gh95r5YZtk9F3VqypGMq+kiVAiFjSeys69/0DHtSb8oVBI3QZv/MSss3pyeAzDZO4KrDYEAr EJiZGWDKPt2g8uvDH2OnM/cuianHg1rVSJzP4FQPPtKGI0DDzOYYxi452L0mcm0RhyJTuG2x06p j7cvwmXR5oRStAT3pnTXudmy5nnBDcTrdDHVRZPAaWjocBxAYSnVGZE5GIlDz49yxAGybRxYfQr SlmWXsZdTNbds+vunbw== X-Proofpoint-ORIG-GUID: hXjVeIlDBR8nsDYsbBD9GThvKFxfXtFR X-Authority-Analysis: v=2.4 cv=Uu32pOwB c=1 sm=1 tr=0 ts=6ae1e97b cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=Wg7rNa81uObU55Q5iCsA:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 X-Proofpoint-GUID: hXjVeIlDBR8nsDYsbBD9GThvKFxfXtFR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-28_04,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 priorityscore=1501 spamscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 suspectscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610280048 On 10/27/26 15:30, Heiko Carstens wrote: > Acquire text_mutex inside __nospec_revert() around the patching loop. > > Serialization is not required for __nospec_revert(), however this is > part of larger series where at the end s390_kernel_write() requires > that callers hold text_mutex. > > Signed-off-by: Heiko Carstens > --- > arch/s390/kernel/nospec-branch.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Ilya Leoshkevich