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Rao" , Michael Ellerman , linux-trace-kernel@vger.kernel.org, Mark Rutland , Steven Rostedt , Masami Hiramatsu , llvm@lists.linux.dev, Maryam Moghadas References: <20260127084926.34497-1-hbathini@linux.ibm.com> Content-Language: en-GB From: Venkat Rao Bagalkote In-Reply-To: <20260127084926.34497-1-hbathini@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: jEaW0EEztOdj0g1ZFujptFKA60au6H7- X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTMwMDA0NyBTYWx0ZWRfX4irutqbuq9l6 2f5rYw2Ae1O/chIYka3uERQgrUQfpcsSo/s4xDAXgPtDXAnXWqrfJR9S5LAbfv7Dd9JY5FsQ/HF qI5g8U6uyiLmMFtFmBdns/PWRLOS54eMMcHHz5WNg4VheXRaUIac1xotA4h7CfxKsRNklEv2qSd 5HPG4b74KzBhWzdPOITdIaDrIpHeU4eLVGB1CL+aeH3/jZbB6yT7z/eUJVCxown/wIona+05UDP 0NbJ5MhLhOpWX94SBf96mQnuE6vMIMmeCb9EHwSOfiKLKNlODbSQkUAFp4EZeXt+2LjtLxFqNa0 eDb8ScEXvQ4JxvfvEG7+g5sDx9JpXNi8Q0xEZA+eICGEu5p5MhsStP0EWLAqre+/EBulIqSvA+b 0OvXpzW9PVji5SzCTi15bR6t0EfGPdR8SAorgbWmXcEZgijMlGighHSpfXccMWkv4wJEO+/UPWw w9jvT24x1raYN4SfzpQ== X-Authority-Analysis: v=2.4 cv=Zs3g6t7G c=1 sm=1 tr=0 ts=697c4d59 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=NEAV23lmAAAA:8 a=VnNF1IyMAAAA:8 a=nOZgRAGxndUz1iHlvXcA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: jEaW0EEztOdj0g1ZFujptFKA60au6H7- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-01-29_03,2026-01-29_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 lowpriorityscore=0 adultscore=0 phishscore=0 suspectscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2601300047 On 27/01/26 2:19 pm, Hari Bathini wrote: > Support for -fpatchable-function-entry on ppc64le was added in Clang > with [1]. Faced a couple of issues while building the linux kernel > with Clang though. Patches 1 & 2 address those issues. The last patch > provides workaround to ensure, an open issue [2] in Clang with > -fpatchable-function-entry support, does not impact the linux > ftrace subsystem. > > [1] https://github.com/llvm/llvm-project/pull/151569 > [2] https://github.com/llvm/llvm-project/issues/163706 > > > Hari Bathini (3): > powerpc64: make clang cross-build friendly > powerpc64/ftrace: fix OOL stub count with clang > powerpc64/ftrace: workaround clang recording GEP in > __patchable_function_entries > > arch/powerpc/Kconfig | 4 +-- > arch/powerpc/kernel/trace/ftrace.c | 26 ++++++++++++++++--- > ....sh => check-fpatchable-function-entry.sh} | 0 > arch/powerpc/tools/ftrace-gen-ool-stubs.sh | 4 +-- > 4 files changed, 26 insertions(+), 8 deletions(-) > rename arch/powerpc/tools/{gcc-check-fpatchable-function-entry.sh => check-fpatchable-function-entry.sh} (100%) > Tested this patch series, and bulild is successful with both GCC and clang23.x version. KERNEL PARAMETER enabled: CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY=y CONFIG_PPC_FTRACE_OUT_OF_LINE=y CONFIG_PPC_FTRACE_OUT_OF_LINE_NUM_RESERVE=32768 clang version 23.0.0git Please add below tag for the series. Tested-by: Venkat Rao Bagalkote Regards, Venkat.