__must_check      108 include/linux/compiler_types.h #define __must_check		__attribute__((__warn_unused_result__))
__must_check      110 include/linux/compiler_types.h #define __must_check
__must_check       21 samples/bpf/xdp_redirect_cpu_user.c #define __must_check
__must_check       51 tools/include/linux/types.h #define __must_check