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Thu, 17 Sep 2026 19:22:39 +0000 (GMT) Received: from tuxmaker.lnxne.boe (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 17 Sep 2026 19:22:39 +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 11/12] s390: Add CC_HAS_ASM_M_FORMAT_FLAG config option Date: Thu, 17 Sep 2026 21:22:36 +0200 Message-ID: <20260917192237.638324-12-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260917192237.638324-1-hca@linux.ibm.com> References: <20260917192237.638324-1-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-Spam-Info: AW1haW4tMjYwOTE3MDI3MiBTYWx0ZWRfX/n86JsQX/nLg T4++vqeA4r3dzP2MAoGYII95waFFyOTEcckYVHymYlojpwE76MJ5qozb1VIpGY+K6M5Rjb8zmoY FGXaIOqoFPIQMYW5qAVxDg+Fayi6dWY= X-Proofpoint-ORIG-GUID: XXRLb-Neclnh0-qQAeM2qL-wPo23XNoa X-Proofpoint-GUID: XXRLb-Neclnh0-qQAeM2qL-wPo23XNoa X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE3MDI3MiBTYWx0ZWRfX7JhqGzbH3mjT l8PHrZ/1npt9OEb/ipouNM0cziTHHcYc1SUJ1+ktW0of6cgcKPPiYKoefrf57UtS6wiczjnls6C /fm6NwogKH4/aLZwCyWSyqtRBS31oMDmt6FnBeN5jN6zY3uYbKeFNDfadO+VC0LW6mq3Fn3+YD3 wFuO8PstF9lOiD2gdNS6pIZ9dDZ+O842pHH68qbJcXHhflevoCGzA9wgPcXf7w63y0NgHoCBqXH kyrhq8xaEQilt3dRMsVhc+JmlZBjiPhttWKFVl4cWu2eSg1tWtXlmpza6fN+3XnyjvkUMKQYDmW DePxRfmkO6+Xl4KWHDpGa68vYDkQiKFTz9XNQwQtSh/nFFX3oCLlRAHs3DzG5PRCXfYdoedBXKy oE+AFlLzqR3sXonv1vTK9MzYVlQENx2E6IUWGeq7yk5fX8shezpW86OsxWFVV3bujrmCu1NvZMS BSAMo+DEy+0wZAbbrlg== X-Authority-Analysis: v=2.4 cv=F+7C5ahN c=1 sm=1 tr=0 ts=6aac3e04 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=FPxSlPHqShoRM3yPCfIA:9 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=2026-09-17_04,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 phishscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609170272 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