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Fri, 18 Sep 2026 08:48:44 +0000 (GMT) Received: from tuxmaker.lnxne.boe (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 18 Sep 2026 08:48:44 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Mete Durlu , Peter Zijlstra , Mark Rutland , Juergen Christ , Ilya Leoshkevich Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v2 11/12] s390: Add CC_HAS_ASM_M_FORMAT_FLAG config option Date: Fri, 18 Sep 2026 10:48:41 +0200 Message-ID: <20260918084842.2333237-12-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260918084842.2333237-1-hca@linux.ibm.com> References: <20260918084842.2333237-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ocEJ9YhiQfIXDIPruy1qXQGPDliKl68q X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE4MDExNyBTYWx0ZWRfXyCkrhH/g3Whl nCNfbeD3ZO0XhbUEbXRiSUjFM3OR1Jtu9yVuV61Jv9cvAOWx7wvfjXLY9pkYnJl3f3dTfXnAQuo LcsZ0UK7omcHSJY2UN3+EMnTdcMqa00= X-Authority-Analysis: v=2.4 cv=cvgOAF4i c=1 sm=1 tr=0 ts=6aacfaf2 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=FPxSlPHqShoRM3yPCfIA:9 X-Proofpoint-ORIG-GUID: ocEJ9YhiQfIXDIPruy1qXQGPDliKl68q X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE4MDExNyBTYWx0ZWRfX8sH9JItzuWdQ d1S4nJK8fKWhkL67gcRqx3sFnnwTiSLvMb6D6sYfR2YqV3m6046C9K8qthgy0JJ5Wk+5xa/tc12 /QWxiB5vGeWPbVKB3GsmZhxHnhWeOgPPjknSfIC86By/RyNVxfb5vmL6poK4SloZNR1R39iYgVJ +x2/IrwjHXrMkC7zdZdj4YDtzG0YboIa94Kx2QgTh9yh2lBCYTuCu7OX5V85HTrz1NuEJW78YuH Ze5gBG+Xb7BdVrUQANVgr6A8lTuRDVFexbneFmiXS2HPEEV0YfQ8hBm8YmaQWx6nkMM4NmD4ys6 lyCctxWXN6ntjmjMHDJvNf1EwJgpeAvmpkdv/QlXoF9HJGMizYY9ms+2ii5bC810/+ntIZ2KR1m IFasYdCxO0fR6XoDojDzQ6Q9Ryxy0fAxP1BeWQTC5jziFhjAnUhOddQXkE1kU6pbxxswt47DaJx pnGLeJ0rCidKgyXTbhA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-18_02,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609180117 Add CONFIG_CC_HAS_ASM_M_FORMAT_FLAG as an indicator if the compiler supports the 'M' operand modifier in inline assemblies. The 'M' modifier allows to access the odd register of a TImode operand. Clang support for this modifier was added recently to llvm-project [1]. The config option can be used to write conditional code depending on compiler features. [1] 28c23411e15f ("[SystemZ] Support the 'M' code for the odd register in inline-asm (#215481)") Signed-off-by: Heiko Carstens --- arch/s390/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 4b51bc6e8948..f1fbbf6eb50a 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -66,6 +66,12 @@ config CC_HAS_ASM_AOR_FORMAT_FLAGS Clang versions before 19.1.0 do not support A, O, and R inline assembly format flags. +config CC_HAS_ASM_M_FORMAT_FLAG + def_bool !(CC_IS_CLANG && CLANG_VERSION < 240100) + help + Clang versions before 24.1.0 do not support the + M inline assembly format flags. + config CC_HAS_ASM_IMMEDIATE_STRINGS def_bool !(CC_IS_GCC && GCC_VERSION < 90000) help -- 2.53.0