Error: Cannot open file include/linux/bpf_crib.h
Error: Cannot open file kernel/bpf/crib/Kconfig
Error: Cannot open file kernel/bpf/crib/Makefile
Error: Cannot open file kernel/bpf/crib/bpf_checkpoint.c
Error: Cannot open file kernel/bpf/crib/bpf_crib.c
Error: Cannot open file kernel/bpf/crib/bpf_restore.c
kernel/bpf/helpers.c:2287: warning: No description found for return value of 'bpf_task_acquire'
kernel/bpf/helpers.c:2316: warning: No description found for return value of 'bpf_cgroup_acquire'
kernel/bpf/helpers.c:2346: warning: No description found for return value of 'bpf_cgroup_ancestor'
kernel/bpf/helpers.c:2366: warning: No description found for return value of 'bpf_cgroup_from_id'
kernel/bpf/helpers.c:2387: warning: No description found for return value of 'bpf_task_under_cgroup'
kernel/bpf/helpers.c:2407: warning: No description found for return value of 'bpf_task_get_cgroup1'
kernel/bpf/helpers.c:2423: warning: No description found for return value of 'bpf_task_from_pid'
kernel/bpf/helpers.c:2790: warning: No description found for return value of 'bpf_iter_bits_new'
kernel/bpf/helpers.c:2842: warning: No description found for return value of 'bpf_iter_bits_next'
kernel/bpf/helpers.c:2287: warning: No description found for return value of 'bpf_task_acquire'
kernel/bpf/helpers.c:2316: warning: No description found for return value of 'bpf_cgroup_acquire'
kernel/bpf/helpers.c:2346: warning: No description found for return value of 'bpf_cgroup_ancestor'
kernel/bpf/helpers.c:2366: warning: No description found for return value of 'bpf_cgroup_from_id'
kernel/bpf/helpers.c:2387: warning: No description found for return value of 'bpf_task_under_cgroup'
kernel/bpf/helpers.c:2407: warning: No description found for return value of 'bpf_task_get_cgroup1'
kernel/bpf/helpers.c:2423: warning: No description found for return value of 'bpf_task_from_pid'
kernel/bpf/helpers.c:2790: warning: No description found for return value of 'bpf_iter_bits_new'
kernel/bpf/helpers.c:2842: warning: No description found for return value of 'bpf_iter_bits_next'