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Constant PATH_MAX is used in function unpriv_helpers.c:open_config(). This constant is provided by include file <limits.h>. The dependency was added by commit [1], which does not include <limits.h> directly, relying instead on <limits.h> being included from zlib.h -> zconf.h. As it turns out, this is not the case for all systems, e.g. on Fedora 41 zlib 1.3.1 is used, and there <limits.h> is not included from zconf.h. Hence, there is a compilation error on Fedora 41. [1] commitfc2915bb8b("selftests/bpf: More precise cpu_mitigations state detection") Fixes:fc2915bb8b("selftests/bpf: More precise cpu_mitigations state detection") Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Acked-by: Viktor Malik <vmalik@redhat.com> Link: https://lore.kernel.org/r/20250618093134.3078870-1-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>