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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 Subject: [PATCH 0/3] powerpc64/ftrace: fixes clang build issues Date: Sun, 9 Nov 2025 02:34:02 +0530 Message-ID: <20251108210405.2375472-1-hbathini@linux.ibm.com> X-Mailer: git-send-email 2.51.1 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: wc92Ckzux93t2Jw3GDjJdetmD-I3piLP X-Proofpoint-ORIG-GUID: wc92Ckzux93t2Jw3GDjJdetmD-I3piLP X-Authority-Analysis: v=2.4 cv=VMPQXtPX c=1 sm=1 tr=0 ts=690fb04e cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=NEAV23lmAAAA:8 a=Ew1Gq7sKqn5lxjvi_p4A:9 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA4MDAyMiBTYWx0ZWRfXxpLUAX8Wgi9p JYub1skAWOGD2Vy/vMP2Hr4aZc3Z3V79cFe7+wrPEgOJGnyd0GIgdCO8XjHvoHHkD8XcC65MyWI HKHvw6bNtFVD4ySEDJkJjK1RPo2z13iFxdv7YCK3tdLn5+e7KR523yDW4ADqg7AnoWIsJbTdU0G J7tH6CBMaga+wSsxNcjs4cSZwxlIoVny8r3TDRlOAJgGHJ8PgpXe7jUR+e5Pp4H3PpGUOT4ZD+F 6HWXPTyYR5aJ8mus2E4dUlI/nR72HxUTZqiJ/keNmtu/Xl1isAtofZYGfjl9WM7qmss6QypaR/e gIPEYCiX+9PmxM+h/rbFLo6Athi1gEY1cgyrE4YWFF8/G5ZDR25qZufdniafmpz6fJJPpn+XNVY NjWsUqrczYoCPYUk4+IzLrk7P6Z23A== 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=2025-11-08_06,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 clxscore=1011 phishscore=0 spamscore=0 malwarescore=0 adultscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511080022 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 | 5 ++-- 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, 27 insertions(+), 8 deletions(-) rename arch/powerpc/tools/{gcc-check-fpatchable-function-entry.sh => check-fpatchable-function-entry.sh} (100%) -- 2.51.1