On Sat, 2021-02-06 at 20:18 -0800, Stephen Boyd wrote:
> A missing semicolon here causes my external display to stop working.
> Indeed, missing the semicolon on the return statement leads to
> dp_panel_update_tu_timings() not existing because the compiler thinks
> it's part of the return statement of a void function, so it must not be
> important.
>
> $ ./scripts/bloat-o-meter before.o after.o
> add/remove: 1/1 grow/shrink: 0/1 up/down: 7400/-7540 (-140)
> Function old new delta
> dp_panel_update_tu_timings - 7400 +7400
> _dp_ctrl_calc_tu.constprop 18024 17900 -124
> dp_panel_update_tu_timings.constprop 7416 - -7416
> Total: Before=54440, After=54300, chg -0.26%
>
> Add a semicolon so this function works like it used to.
[]
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
[]
> @@ -631,7 +631,7 @@ static void _dp_ctrl_calc_tu(struct dp_tu_calc_input *in,
>
>
> tu = kzalloc(sizeof(*tu), GFP_KERNEL);
> if (!tu)
> - return
> + return;
>
>
> dp_panel_update_tu_timings(in, tu);
Wow, that's really unfortunate that dp_panel_update_tu_timings
is also void.
Perhaps this as YA checkpatch warning:
---
scripts/checkpatch.pl | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 9a549b009d2f..6df13e5a1557 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3674,6 +3674,12 @@ sub process {
}
}
+# check only a c90 keyword on the line (except else)
+ if ($sline =~ /^\+\s*($c90_Keywords)\s*$/ && $1 ne 'else') {
+ WARN("BARE_KEYWORD",
+ "'$1' as the only word on a line is not good style\n" . $herecurr);
+ }
+
# check multi-line statement indentation matches previous line
if ($perl_version_ok &&
$prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
