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Upstream commit7a1f400ff5("tools: Ensure tools copy of linux/filter.h exports the UAPI") caused selftests/bpf build to fail [1] with: In file included from progs/arena_atomics.c:9: /codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf/../../../include/linux/filter.h:9:10: fatal error: 'uapi/linux/filter.h' file not found 9 | #include <uapi/linux/filter.h> | ^~~~~~~~~~~~~~~~~~~~~ 1 error generated. CLNG-BPF [test_progs] bind_perm.bpf.o make: *** [Makefile:888: /codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf/arena_atomics.bpf.o] Error 1 make: *** Waiting for unfinished jobs.... GEN-OBJ [libarena] libarena.bpf.o GEN-SKEL [libarena] libarena.skel.h make: Leaving directory '/codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf' Process completed with exit code 2. BPF selftest programs include the tools header directly, but BPF_CFLAGS only exposes tools/include/uapi. Compiler therefore cannot resolve the nested UAPI include. Add tools/include after tools/include/uapi in BPF_CFLAGS. This preserves the existing UAPI header precedence while allowing tools headers to include uapi headers. [1] https://github.com/kernel-patches/bpf/actions/runs/31806678733/job/94787271162 Fixes:7a1f400ff5("tools: Ensure tools copy of linux/filter.h exports the UAPI") Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20260814173522.2783625-1-ihor.solodrai@linux.dev