libbpf: Fix false uninitialized variable warning

Some versions of GCC falsely detect that vi might not be initialized. That's
not true, but let's silence it with NULL initialization.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200430021436.1522502-1-andriin@fb.com

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index d86ff82..977add1 100644 (file)
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -5003,8 +5003,8 @@ static int bpf_object__collect_map_relos(struct bpf_object *obj,
                                         GElf_Shdr *shdr, Elf_Data *data)
 {
        int i, j, nrels, new_sz, ptr_sz = sizeof(void *);
+       const struct btf_var_secinfo *vi = NULL;
        const struct btf_type *sec, *var, *def;
-       const struct btf_var_secinfo *vi;
        const struct btf_member *member;
        struct bpf_map *map, *targ_map;
        const char *name, *mname;