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Mon, 4 May 2026 08:42:18 +0000 (GMT) Message-ID: <362eaba2-54dd-4b59-81f5-65abb916e916@linux.ibm.com> Date: Mon, 4 May 2026 14:12:17 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-GB To: Saket Kumar Bhaskar , Hari Bathini , Madhavan Srinivasan , bpf , linuxppc-dev Cc: LKML From: Venkat Rao Bagalkote Subject: [mainline][bpf] build failure: conflicting bpf_arena_* prototypes between vmlinux.h and bpf_arena_common.h Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=XPQAjwhE c=1 sm=1 tr=0 ts=69f85bef cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=NEAV23lmAAAA:8 a=Twlkf-z8AAAA:8 a=VnNF1IyMAAAA:8 a=YpS5cAcgm0N0_-8T5d8A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=-74SuR6ZdpOK_LpdRCUo:22 X-Proofpoint-ORIG-GUID: qeXqwpzTW6JxWApumdjaFVfclh9k_hBq X-Proofpoint-GUID: qeXqwpzTW6JxWApumdjaFVfclh9k_hBq X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA0MDA5MiBTYWx0ZWRfXwgx6MUuZMipr 2LHot8qENNDik5eDv75/+yQXETdG9t78RsnkXjnCygW+KNPTmM1W57egnILQ7NbM/U99bMmOMEs BjHu2c6XBENHPAk6nuH9XFMD0NmhXqqC3Ll8TBFGTKOoD89s2lL3ik3A4bbRQmiK1G7MbJjuJ7w OuUt1Uie8Hk07ZnhYtTyqVl56ItMgCg3JTfbskr5K36WaClosuoR3Jjp19WqWGyz1IOVPbEJjia 4bMmsfwD7tVeNgsf+3FyLBWKQrAZLSQEInabXVt1zCbgEDhJbFuWtpKZuV8llgOink4qbhYpWla 5dPhxJJBY/pdRxsSZmjvD0HgZ+gG6a2vJgGRihKHhubZvZ+VQ6mX3C4HBycBs7O9MEE8jTPVAVw x2m0JeW9VyMm0EZYANLZ7t9rYlVFUrYNfLFb4mdBxQPmBkG5yvkVakjjFzABPkA9upktbAjvWj8 0mv+wHVKhKsUP7j++mQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0 priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040092 Greetings!!! I’m seeing a CLANG-BPF build failure in tools/testing/selftests/bpf related to conflicting prototypes of bpf_arena_* helpers between vmlinux.h and bpf_arena_common.h, on mainline kernel. Error log:   In file included from progs/arena_strsearch.c:12:   In file included from tools/testing/selftests/bpf/bpf_arena_strsearch.h:4:   tools/testing/selftests/bpf/bpf_arena_common.h:47:15:     error: conflicting types for 'bpf_arena_alloc_pages'       void __arena* bpf_arena_alloc_pages(void *map,                                           void __arena *addr,                                           __u32 page_cnt,                                           __u32 node_id,                                           __u64 flags);   tools/testing/selftests/bpf/tools/include/vmlinux.h:135295:14:     note: previous declaration is here       extern void *bpf_arena_alloc_pages(void *p__map,                                          void *addr__ign,                                          u32 page_cnt,                                          int node_id,                                          u64 flags) __weak __ksym;   tools/testing/selftests/bpf/bpf_arena_common.h:49:5:     error: conflicting types for 'bpf_arena_reserve_pages'       int bpf_arena_reserve_pages(void *map,                                   void __arena *addr,                                   __u32 page_cnt) __ksym __weak;   tools/testing/selftests/bpf/tools/include/vmlinux.h:135297:12:     note: previous declaration is here       extern int bpf_arena_reserve_pages(void *p__map,                                          void *ptr__ign,                                          u32 page_cnt) __weak __ksym;   tools/testing/selftests/bpf/bpf_arena_common.h:50:6:     error: conflicting types for 'bpf_arena_free_pages'       void bpf_arena_free_pages(void *map,                                 void __arena *ptr,                                 __u32 page_cnt) __ksym __weak;   tools/testing/selftests/bpf/tools/include/vmlinux.h:135296:13:     note: previous declaration is here       extern void bpf_arena_free_pages(void *p__map,                                        void *ptr__ign,                                        u32 page_cnt) __weak __ksym; Tool chain Versions: gcc (GCC) 14.2.0 # clang --version clang version 23.0.0git (https://github.com/llvm/llvm-project.git bd6bfba3e50343c112a04b639394ab85be17c29b) # llc --version LLVM (http://llvm.org/):   LLVM version 23.0.0git   Optimized build.   Default target: powerpc64le-unknown-linux-gnu   Host CPU: (unknown)   Registered Targets:     bpf     - BPF (host endian)     bpfeb   - BPF (big endian)     bpfel   - BPF (little endian)     ppc32   - PowerPC 32     ppc32le - PowerPC 32 LE     ppc64   - PowerPC 64     ppc64le - PowerPC 64 LE # objcopy --version | head -1 GNU objcopy version 2.35.2-67.el9_7.1 # ld --version | head -1 GNU ld version 2.35.2-67.el9_7.1 If you happen to fix this, please add below tag. Reported-by: Venkat Rao Bagalkote Regards, Venkat.