BITS_PER_BYTE_MASK 161 kernel/bpf/btf.c #define BITS_PER_BYTE_MASK (BITS_PER_BYTE - 1) BITS_PER_BYTE_MASK 16 tools/bpf/bpftool/btf_dumper.c #define BITS_PER_BYTE_MASK (BITS_PER_BYTE - 1)