On Mon, 31 Aug 2020 at 07:59, Daniel Borkmann <daniel@xxxxxxxxxxxxx> wrote:
>
> On 8/31/20 2:03 AM, Tony Ambardar wrote:
> > While compiling libbpf, some GCC versions (at least 8.4.0) have difficulty
> > determining control flow and a emit warning for potentially uninitialized
> > usage of 'map', which results in a build error if using "-Werror":
> >
> > In file included from libbpf.c:56:
> > libbpf.c: In function '__bpf_object__open':
> > libbpf_internal.h:59:2: warning: 'map' may be used uninitialized in this function [-Wmaybe-uninitialized]
> > libbpf_print(level, "libbpf: " fmt, ##__VA_ARGS__); \
> > ^~~~~~~~~~~~
> > libbpf.c:5032:18: note: 'map' was declared here
> > struct bpf_map *map, *targ_map;
> > ^~~
> >
> > The warning/error is false based on code inspection, so silence it with a
> > NULL initialization.
> >
> > Fixes: 646f02ffdd49 ("libbpf: Add BTF-defined map-in-map support")
> > Ref: 063e68813391 ("libbpf: Fix false uninitialized variable warning")
> >
> > Signed-off-by: Tony Ambardar <Tony.Ambardar@xxxxxxxxx>
>
> Applied, thanks!
Thanks, Daniel. I forgot to ask/confirm whether this will get applied
to the 5.8.x stable branch, since it was first encountered there.
