Hello Martin KaFai Lau,
The patch 85d33df357b6: "bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS" from
Jan 8, 2020, leads to the following static checker warning:
kernel/bpf/bpf_struct_ops.c:501 bpf_struct_ops_map_seq_show_elem()
warn: 'value' is an error pointer or valid
kernel/bpf/bpf_struct_ops.c
495 static void bpf_struct_ops_map_seq_show_elem(struct bpf_map *map, void *key,
496 struct seq_file *m)
497 {
498 void *value;
499
500 value = bpf_struct_ops_map_lookup_elem(map, key);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This is just a dummy function that only returns -EINVAL.
501 if (!value)
502 return;
503
504 btf_type_seq_show(btf_vmlinux, map->btf_vmlinux_value_type_id,
505 value, m);
506 seq_puts(m, "\n");
507 }
regards,
dan carpenter
