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Peter Anvin" , Thomas Gleixner , Christian Borntraeger , =?UTF-8?q?Michal=20Such=C3=A1nek?= , Peter Zijlstra , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 0/2] s390: keep syscall number / return value in separate pt_regs members Date: Wed, 15 Jul 2026 15:38:28 +0200 Message-ID: <20260715133830.2619853-1-svens@linux.ibm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=fOcJG5ae c=1 sm=1 tr=0 ts=6a578d7a cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=yE0iEfProg0caIylHQIA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE1MDEzMSBTYWx0ZWRfXzBLiQ/nyOnMp nf0XnyhhuIgMSU6RjLqrZfA6sgG7rCAmaEZOqRbidSB5GiWkRQILtNJiC4gZdxIMYHRnTVc4cpc w4btYyag0T+PalAYvtJara2xMaDGsgKCgdALii/SvNX948mL/Sidh+LzONWGiQq00QJch2x8g7X no8kKwstL8q7XtGjotaQ8LA+MhtKiUfRXeBUwLOd0JSHjwH7rfMLuq0HrAi+SFGHRqqo1mCTAdh KZYUx8LbRY9TNsrHa6kfNbrthJ9Eo9dpCsHzt2llkhkitlFpfJzBhVtaz42wgqqF7kmuoC7dHcK ACfYB/WXQCYqckuA8EO/pzJ/oVW3jaSDIlmoHlBX5WDhI9DQ+EtXtyDauZigirQ5dEfz+Wfebiv nns9dFlgpyUbHEyX8BDFlLQCnfdurmz5Nk8Wvvgib5Un4dX/E/jUKoIOTDveqfsGf/rZ63IHzFy vtDASy8GkSysiAAG/Ug== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE1MDEzMSBTYWx0ZWRfX0J1VvZKABZgi 5RJimMNA0Wc7yQl0A2aRDTLw6z9YWUeyTJYx+SPBV9GJT+9lm1JuRxKdk48Azztvs12lMSDG5c5 THlx/TLmd8ZPgeO6RBG/bqTOnv4+vQ8= X-Proofpoint-GUID: Ol3v1ypv2XF2xjOYZdwyb_mxmQ7E7N81 X-Proofpoint-ORIG-GUID: Ol3v1ypv2XF2xjOYZdwyb_mxmQ7E7N81 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-15_02,2026-07-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 impostorscore=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607150131 After a recent discussion on the ML about syscall semantics wrt. pre-init= ializing the return value to -ENOSYS and the special handling s390 has, I made two= patches to clean that up. See the commit messages for more details. The second patch is just a cleanup and could be dropped if not wanted. Sven Schnelle (2): s390/syscall: Keep syscall return in extra ptregs member s390/syscall: Keep syscall number in extra ptregs member arch/s390/include/asm/ptrace.h | 9 ++++++--- arch/s390/include/asm/syscall.h | 13 +++++++------ arch/s390/kernel/ptrace.c | 2 +- arch/s390/kernel/signal.c | 12 +++++------- arch/s390/kernel/syscall.c | 26 +++++++------------------- 5 files changed, 26 insertions(+), 36 deletions(-) --=20 2.53.0