perf annotate TUI browser: Do not use member from variable within its own initialization

Some compilers will complain when using a member of a struct to
initialize another member, in the same struct initialization.

For instance:

  debian:8      Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
  oraclelinux:7 clang version 3.4.2 (tags/RELEASE_34/dot2-final)

Produce:

  ui/browsers/annotate.c:104:12: error: variable 'ops' is uninitialized when used within its own initialization [-Werror,-Wuninitialized]
                                              (!ops.current_entry ||
                                                ^~~
  1 error generated.

So use an extra variable, initialized just before that struct, to have
the value used in the expressions used to init two of the struct
members.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: c298304bd747 ("perf annotate: Use a ops table for annotation_line__write()")
Link: https://lkml.kernel.org/n/tip-f9nexro58q62l3o9hez8hr0i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 98d934a..b0d089a 100644 (file)
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -97,11 +97,12 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
        struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
        struct annotation *notes = browser__annotation(browser);
        struct annotation_line *al = list_entry(entry, struct annotation_line, node);
+       const bool is_current_entry = ui_browser__is_current_entry(browser, row);
        struct annotation_write_ops ops = {
                .first_line              = row == 0,
-               .current_entry           = ui_browser__is_current_entry(browser, row),
+               .current_entry           = is_current_entry,
                .change_color            = (!notes->options->hide_src_code &&
-                                           (!ops.current_entry ||
+                                           (!is_current_entry ||
                                             (browser->use_navkeypressed &&
                                              !browser->navkeypressed))),
                .width                   = browser->width,