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Mon, 22 Dec 2025 11:28:51 +0000 (GMT) Date: Mon, 22 Dec 2025 12:28:49 +0100 From: Heiko Carstens To: Thomas =?iso-8859-1?Q?Wei=DFschuh?= Cc: Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] s390: Implement ARCH_HAS_CC_CAN_LINK Message-ID: <20251222112849.16440C5c-hca@linux.ibm.com> References: <20251222-cc-can-link-s390-v1-1-0b2c4998c066@linutronix.de> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20251222-cc-can-link-s390-v1-1-0b2c4998c066@linutronix.de> X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDEwMyBTYWx0ZWRfXzND3w7/U+krU 2XMsXLwyb5rZjYDmtViCfjN80g2tPmGetqXj9FeH03XTtTXDMdYiwVngbeJcyErCV5+t1WXz+vl 1xOyXeuIYv3LwIyfAUK6pHBpIqJymDR+33sl2CdgbR3mRXbz7IWTS9qanw31klvk0J1E7pT3oaL 5r1BhOxqfshJcK4knWZmEbKQf0yKL1k3SmD85MEjEQ+s55tCY85jQkRnalYY4nH5wM7CZgNF8we uELw09Z4F3QwmE3YN6CkIcm5ZC2un4zpgCSZufX7loBUMqXbVsS5kryoFztGc/2v6AlxnHgpM/O ehMVRr5QOExS3Jxunf+7wiQUZKkxZn9uPO3t2d1pnugXZgFlunJ3otLogw1zojDvLdY7Ss9AEGp gF9IFt04IHJdS/Ls4lHnyZYdkUjYQtB1lA6is1X6XuH7AaHM/nKmNF1STkyN/oz97Q+l5geo/pD zrb/quFHWjw/ZRwp07w== X-Authority-Analysis: v=2.4 cv=Ba3VE7t2 c=1 sm=1 tr=0 ts=69492b78 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=8nJEP1OIZ-IA:10 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=DtSwU3RMzSsuwpdqjt8A:9 a=3ZKOabzyN94A:10 a=wPNLvfGTeEIA:10 X-Proofpoint-ORIG-GUID: vXQFVDIBLdB0H518S5oU2Wy9ikYxTKt2 X-Proofpoint-GUID: vXQFVDIBLdB0H518S5oU2Wy9ikYxTKt2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-21_05,2025-12-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 bulkscore=0 adultscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2512120000 definitions=main-2512220103 On Mon, Dec 22, 2025 at 09:28:17AM +0100, Thomas Weißschuh wrote: > The generic CC_CAN_LINK detection relies on -m32/-m64 compiler flags. > s390 toolchains use -m31 instead but that is not supported in the > kernel. Some s390 toolchains default to -m31, depending on how they are built. Actually I'm only aware of a single one. But given that this one is used all over the place for cross builds it is important enough. > Make the logic easier to understand and allow the simplification of the > generic CC_CAN_LINK by using a tailored implementation. > > Signed-off-by: Thomas Weißschuh > --- > arch/s390/Kconfig | 9 +++++++++ > 1 file changed, 9 insertions(+) Applied, and scheduled for the next merge window. Thanks!