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Thu, 22 Jun 2023 12:55:14 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 35MCt9j624576588 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Jun 2023 12:55:09 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 79D6B20043; Thu, 22 Jun 2023 12:55:09 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2FEB82004F; Thu, 22 Jun 2023 12:55:09 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 22 Jun 2023 12:55:09 +0000 (GMT) From: Heiko Carstens To: Nathan Chancellor Cc: Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Ulrich Weigand , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] s390/decompresser: fix misaligned symbol build error Date: Thu, 22 Jun 2023 14:55:08 +0200 Message-Id: <20230622125508.1068457-1-hca@linux.ibm.com> X-Mailer: git-send-email 2.39.2 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: asdIpcSa8pPfj8Xz50nagA6-Sp0SJTWT X-Proofpoint-ORIG-GUID: asdIpcSa8pPfj8Xz50nagA6-Sp0SJTWT Content-Transfer-Encoding: quoted-printable X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-22_08,2023-06-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 phishscore=0 bulkscore=0 mlxlogscore=999 clxscore=1011 adultscore=0 priorityscore=1501 suspectscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306220105 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Nathan Chancellor reported a kernel build error on Fedora 39: $ clang --version | head -1 clang version 16.0.5 (Fedora 16.0.5-1.fc39) $ s390x-linux-gnu-ld --version | head -1 GNU ld version 2.40-1.fc39 $ make -skj"$(nproc)" ARCH=3Ds390 CC=3Dclang CROSS_COMPILE=3Ds390x-linux-gn= u- olddefconfig all s390x-linux-gnu-ld: arch/s390/boot/startup.o(.text+0x5b4): misaligned symbo= l `_decompressor_end' (0x35b0f) for relocation R_390_PC32DBL make[3]: *** [.../arch/s390/boot/Makefile:78: arch/s390/boot/vmlinux] Error= 1 It turned out that the problem with misaligned symbols on s390 was fixed with commit 80ddf5ce1c92 ("s390: always build relocatable kernel") for the kernel image, but did not take into account that the decompressor uses its own set of CFLAGS, which come without -fPIE. Add the -fPIE flag also to the decompresser CFLAGS to fix this. Reported-by: Nathan Chancellor Suggested-by: Ulrich Weigand Link: https://github.com/ClangBuiltLinux/linux/issues/1747 Signed-off-by: Heiko Carstens Reported-by: CKI Tested-by: Nathan Chancellor --- arch/s390/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/Makefile b/arch/s390/Makefile index ed646c583e4f..5ed242897b0d 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -27,6 +27,7 @@ KBUILD_CFLAGS_DECOMPRESSOR +=3D -fno-delete-null-pointer-= checks -msoft-float -mbac KBUILD_CFLAGS_DECOMPRESSOR +=3D -fno-asynchronous-unwind-tables KBUILD_CFLAGS_DECOMPRESSOR +=3D -ffreestanding KBUILD_CFLAGS_DECOMPRESSOR +=3D -fno-stack-protector +KBUILD_CFLAGS_DECOMPRESSOR +=3D -fPIE KBUILD_CFLAGS_DECOMPRESSOR +=3D $(call cc-disable-warning, address-of-pack= ed-member) KBUILD_CFLAGS_DECOMPRESSOR +=3D $(if $(CONFIG_DEBUG_INFO),-g) KBUILD_CFLAGS_DECOMPRESSOR +=3D $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call c= c-option, -gdwarf-4,)) --=20 2.39.2