perf tools: Fix errors under optimization level '-Og'
authorChangbin Du <changbin.du@gmail.com>
Sat, 16 Mar 2019 08:05:43 +0000 (16:05 +0800)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 19 Mar 2019 19:52:04 +0000 (16:52 -0300)
commit11c1ea6f1a9bc97bf857fd12f72eacb6c69794e2
tree2cbead67468a2eb257e729481bc212589dd2868d
parent39df730b09774bd860e39ea208a48d15078236cb
perf tools: Fix errors under optimization level '-Og'

Optimization level '-Og' offers a reasonable level of optimization while
maintaining fast compilation and a good debugging experience. This patch
tries to make it work.

  $ make DEBUG=1 EXTRA_CFLAGS='-Og'
  bench/epoll-ctl.c: In function ‘do_threads’:
  bench/epoll-ctl.c:274:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
    return ret;
           ^~~
  ...

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20190316080556.3075-4-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/lib/bpf/libbpf.c
tools/perf/bench/epoll-ctl.c
tools/perf/bench/epoll-wait.c
tools/perf/tests/backward-ring-buffer.c