From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=148.163.158.5 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793111439; b=sibhwodcY/HoWn9LpYaPvbfbGWH3DABoOHlMMC9ZJsrMM5yimgy95KCoYoe+tmYZkiMU LNEtM24vDICE/tiSCCr4g/YjUJ2COtCjMwuaeCMuS7FP/gZjRcsTtJbkfz0waoQO+LcS9 yT2cKRJJWACli+9nioqjOpsZiBxZVuxHwtUdHi+2VI5Jv4o2GigAwGMs0DL9bj4pKHnLw HP2TnFXfTh1ShiNFVKvw2WdOieIK19eBrGEorifQhvU9Wf5azFwxczqtAo+T+/lGiL1d2 hbqhkhyjBT99eMVcPbS34eW1MVsoweI7gtWZ7novLWTORyMw73q1AY72kU0WIh9bEpA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793111439; h=DMARC-Filter:Received:DKIM-Signature:Received:Received:Received: Received:Received:Received:Received:From:To:Cc:Subject:Date: Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-TM-AS-GCONF:X-Authority-Analysis: X-Proofpoint-GUID:X-Proofpoint-Spam-Info:X-Proofpoint-ORIG-GUID: X-Proofpoint-Spam-Details-Enc:X-Proofpoint-Virus-Version: X-Proofpoint-Spam-Details; bh=uSmC4/nt8Z2FZBo/AzVQtr84u0BN6mGkw5ctpkF+Lu0=; b=m9oz2vQbQjlkwNdCEp+b82tZy+4+ANppsN9n8xL5pQu/CBPccMRxPLzlWd9ViezxDz0U cQ3rci5bD1OPpnqav8fti+LxeW7CD/lur6Ja1tz7ds3pHhnIK6rggR1I6yuKQMlxydjz/ bi+iZ8GokSMGkl6dmQdDXagooqHlv6TilePYRcEeKnEALlXfeAljJQ86KiqgTVxbZYxG8 dfwh2pAOOc6PCzkjMZAIrp2RhIeXYqb9NBnlSRqpW89Buav/flN9K9sv9eCNc6u+tqzQD g2iPdUyp3jD0zv91IaxGJC8M8PEsiOxlrZd1T+U/w9p07M/54tJ1DsRzKZBmitIsC0w== 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=Nw5078ua; arc=none smtp.remote-ip=148.163.158.5 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 4A17D606A339; Tue, 27 Oct 2026 14:30:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 4A17D606A339 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=Nw5078ua Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 69REEaI22697679; Tue, 27 Oct 2026 14:30:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=uSmC4/nt8Z2FZBo/A zVQtr84u0BN6mGkw5ctpkF+Lu0=; b=Nw5078uavoy5+xvC0DzZUmbdYk6OwFF+r XO+jOC4FnDwoSRQR7nab8tSJTUE33oDIYDfjxpT1uCE6QBy1XkIXMjDltv+K9jLO ZNrC/fcECmk0wuyF1IcVNIu094jFwfk/ApUusDHR6K6fvGaD1urqu0h5uaYgZKZq +vM4epnOYaV96C9cCFsO88jFepqZJnHY/3L1nswUokLPcC1rjPquxGh194wG846p QOBdOiLEpjakOx1J2uUlpo7ter7RToBFJBdwQkEOltXUidNFj44xYdvca6QygrYa IvQHk/VW/PpQLzPuxbWYNXkMbbUWe0/XRtkvBEbnqiRF7EpQKnsOg== 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 4hgmavfgad-1 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Tue, 27 Oct 2026 14:30:37 +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 69RDoqRE054387; Tue, 27 Oct 2026 14:30:36 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4hjsu7ryrs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 27 Oct 2026 14:30:36 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 69REUVFQ34537812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 27 Oct 2026 14:30:32 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C4C852004E; Tue, 27 Oct 2026 14:30:31 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 99BAA20040; Tue, 27 Oct 2026 14:30:31 +0000 (GMT) Received: from tuxmaker.lnxne.boe (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 27 Oct 2026 14:30:31 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Ilya Leoshkevich Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v2 04/10] s390/runtime-const: Serialize text patching with text_mutex Date: Tue, 27 Oct 2026 15:30:24 +0100 Message-ID: <20261027143030.3154657-5-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261027143030.3154657-1-hca@linux.ibm.com> References: <20261027143030.3154657-1-hca@linux.ibm.com> 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 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=P8SvFSAu c=1 sm=1 tr=0 ts=6ae0b58d cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=00iQXdrkLu6meO8cnrkA:9 X-Proofpoint-GUID: 03o7sryTX-0FWRE3SjeNQIbnTzIKD6ZG X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI3MDA1NiBTYWx0ZWRfXzFjEwVk5C1bX q++rM8dpsmpF+j+i0dXDAbxuIq7RLIc4nJtpKH3fucO+yvZjwqcH5u+HkQclFsAg+3MRYX/95kC 9fo9PJKC69qO0rm/HC6hXt35xolpkUI= X-Proofpoint-ORIG-GUID: 03o7sryTX-0FWRE3SjeNQIbnTzIKD6ZG X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI3MDA1NiBTYWx0ZWRfX/RFTvyVR4F7w 2r1mpfTtzP3OCBLopLlxEksOvmnLRh1QYsNRVQ1N0fBWSbmFpHVI3jqRidx4EdWi3gTcVfqwbbI mlCO1g/FGW9OBMUJXKegMjwcOuWjznFBfE2iTkUpYIAGxXwDVAyslMG+x/1VpcdUbL6JjubtZPT Usgk2hbLeT31+1AUsr3MGuQcm/tleN2COvyOGlmZ2MPCJyCOeCutrT21RbRLthtRY4LapTh4cL0 8Gm5XP6DJ/QhjEEgIFwdosXAxF1UeVI5490X0kltLmMXifAxI0mvsoIZJF8AVm4Y3l9wEjonacz G0heVCU5BovUwPvFjXlLp/prAoWD5yGLyA4RwJD13tvv45+bFy8wAcb5sG2P5GsFTa2ocut99VV zwVsGhwGwRORwEOs1tbGeGDcE+qHGwsL2cG6qx6isJ6Obxo4i8tvt6Uo3UYEHEZ6P/Yq3MPg+XN MG8Hgkqu1z9rx4bC0mA== 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=2026-10-27_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 malwarescore=0 phishscore=0 spamscore=0 clxscore=1015 bulkscore=0 suspectscore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610270056 Acquire text_mutex inside runtime_const_fixup() around the patching loop. Serialization is not required for runtime_const_fixup(), 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/include/asm/runtime-const.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/include/asm/runtime-const.h b/arch/s390/include/asm/runtime-const.h index 7b71156031ec..0e2402717e8b 100644 --- a/arch/s390/include/asm/runtime-const.h +++ b/arch/s390/include/asm/runtime-const.h @@ -3,6 +3,7 @@ #define _ASM_S390_RUNTIME_CONST_H #include +#include #define runtime_const_ptr(sym) \ ({ \ @@ -88,6 +89,7 @@ static inline void __runtime_fixup_mask(void *where, unsigned long val) static inline void runtime_const_fixup(void (*fn)(void *, unsigned long), unsigned long val, s32 *start, s32 *end) { + guard(mutex)(&text_mutex); while (start < end) { fn(*start + (void *)start, val); start++; -- 2.53.0