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a0f17cc666
When building bpftool, a warning was introduced by commit a94364603610 ("bpftool: Allow to read btf as raw data"), because the return value from a call to 'read()' is ignored. Let's address it. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20191119111706.22440-1-quentin.monnet@netronome.com