On Mon, May 4, 2026 at 10:42 AM Venkat Rao Bagalkote <[email protected]> wrote: > > 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 <[email protected]>
The issue is in your setup. It was brought up a couple times in the past. Please search archives.
