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Fri, 27 Jun 2025 09:34:44 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2440920063; Fri, 27 Jun 2025 09:34:44 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 428E920067; Fri, 27 Jun 2025 09:34:43 +0000 (GMT) Received: from osiris (unknown [9.87.133.27]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 27 Jun 2025 09:34:43 +0000 (GMT) Date: Fri, 27 Jun 2025 11:34:41 +0200 From: Heiko Carstens To: Josh Poimboeuf Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Petr Mladek , Miroslav Benes , Joe Lawrence , live-patching@vger.kernel.org, Song Liu , laokz , Jiri Kosina , Marcos Paulo de Souza , Weinan Liu , Fazla Mehrab , Chen Zhongjin , Puranjay Mohan , Dylan Hatch , Vasily Gorbik , Alexander Gordeev Subject: Re: [PATCH v3 01/64] s390/vmlinux.lds.S: Prevent thunk functions from getting placed with normal text Message-ID: <20250627093441.13723Cc6-hca@linux.ibm.com> References: Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-TM-AS-GCONF: 00 X-Proofpoint-GUID: fe3LNM31hmI-ErQ5KLeZVwQYtEaINleh X-Proofpoint-ORIG-GUID: c13wTOi2JO6eUTq-HbyluyI3E9FBmqDF X-Authority-Analysis: v=2.4 cv=Hul2G1TS c=1 sm=1 tr=0 ts=685e65b9 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=kj9zAlcOel0A:10 a=6IFa9wvqVegA:10 a=VnNF1IyMAAAA:8 a=VwQbUJbxAAAA:8 a=awXcams9sirMRC52x60A:9 a=CjuIK1q_8ugA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjI3MDA3NSBTYWx0ZWRfXxllruMVAWW6w KEi2biYzA3K0u+UNfuWl70ba+fUPbMx9FLt9ZqIZlFthnje/ctkWyYBwOSncozIOXRTG3hI++U9 O4SWtnRPC6BtPXRhZF77NAWTfAio/8xSE3ZweThFC252NuTUDz/xQT1lPI7D1Ifjyx6NfXUwMI7 5qf2pS42mKljBPp9/ccGMShOd6I5tmd2vwxQtIlojjfDybxnLKO2AZ7gPilVpoD5PHXi77q7DYY asN7Ik3Xq6tfAkcRvy5c2s8iY8ZbBHaftmp91qgK+vAn9Pxs0FKxejKBYCQteC4T+/HBLKgDbek NDAsWP4mELniCi395n0BOwAgkBTIQ3TJBM39e5eq/NFuonbz87fppct1cRnCPulnAzLZy2rSfpn KgiEOvB3wqufv+sHxVS16a9pqpKHULVmA8/0qflzWy0vCFdivnOWZe9UtfURUe8tNqHlb9Ek X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-06-27_03,2025-06-26_05,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=530 bulkscore=0 mlxscore=0 adultscore=0 spamscore=0 impostorscore=0 clxscore=1011 priorityscore=1501 lowpriorityscore=0 suspectscore=0 phishscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506270075 On Thu, Jun 26, 2025 at 04:54:48PM -0700, Josh Poimboeuf wrote: > The s390 indirect thunks are placed in the .text.__s390_indirect_jump_* > sections. > > Certain config options which enable -ffunction-sections have a custom > version of the TEXT_TEXT macro: > > .text.[0-9a-zA-Z_]* > > That unintentionally matches the thunk sections, causing them to get > grouped with normal text rather than being handled by their intended > rule later in the script: > > *(.text.*_indirect_*) > > Fix that by adding another period to the thunk section names, following > the kernel's general convention for distinguishing code-generated text > sections from compiler-generated ones. > > Cc: Heiko Carstens > Cc: Vasily Gorbik > Cc: Alexander Gordeev > Signed-off-by: Josh Poimboeuf > --- > arch/s390/include/asm/nospec-insn.h | 2 +- > arch/s390/kernel/vmlinux.lds.S | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) Acked-by: Heiko Carstens