../kernel/bpf/syscall.c: In function ‘collect_externs’:
../kernel/bpf/syscall.c:6463:34: error: implicit declaration of function ‘bpf_core_essential_name_len’ [-Wimplicit-function-declaration]
 6463 |                 ext_essent_len = bpf_core_essential_name_len(ext->name);
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
make[5]: *** [../scripts/Makefile.build:194: kernel/bpf/syscall.o] Error 1
make[4]: *** [../scripts/Makefile.build:440: kernel/bpf] Error 2
make[3]: *** [../scripts/Makefile.build:440: kernel] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/home/nipa/net-next/wt-1/Makefile:1993: .] Error 2
make[1]: *** [/home/nipa/net-next/wt-1/Makefile:251: __sub-make] Error 2
make: *** [Makefile:251: __sub-make] Error 2
../kernel/bpf/syscall.c: In function ‘collect_externs’:
../kernel/bpf/syscall.c:6463:34: error: implicit declaration of function ‘bpf_core_essential_name_len’ [-Wimplicit-function-declaration]
 6463 |                 ext_essent_len = bpf_core_essential_name_len(ext->name);
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
make[5]: *** [../scripts/Makefile.build:194: kernel/bpf/syscall.o] Error 1
make[4]: *** [../scripts/Makefile.build:440: kernel/bpf] Error 2
make[3]: *** [../scripts/Makefile.build:440: kernel] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/home/nipa/net-next/wt-1/Makefile:1993: .] Error 2
make[1]: *** [/home/nipa/net-next/wt-1/Makefile:251: __sub-make] Error 2
make: *** [Makefile:251: __sub-make] Error 2