[PATCH AUTOSEL 5.3 52/71] libbpf: fix false uninitialized variable warning

Sasha Levin
2019-10-01T17:00:43Z

From: Andrii Nakryiko <andriin@fb.com>

[ Upstream commit aef70a1f44c0b570e6345c02c2d240471859f0a4 ]

Some compilers emit warning for potential uninitialized next_id usage.
The code is correct, but control flow is too complicated for some
compilers to figure this out. Re-initialize next_id to satisfy
compiler.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/lib/bpf/btf_dump.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c
index 7065bb5b27525..e1357dbb16c24 100644
--- a/tools/lib/bpf/btf_dump.c
+++ b/tools/lib/bpf/btf_dump.c
@@ -1213,6 +1213,7 @@ static void btf_dump_emit_type_chain(struct btf_dump *d,
return;
}

+ next_id = decls->ids[decls->cnt - 1];
next_t = btf__type_by_id(d->btf, next_id);
multidim = btf_kind_of(next_t) == BTF_KIND_ARRAY;
/* we need space if we have named non-pointer */
--
2.20.1