* [PATCH] trace-cmd: Silence a logical-not-parentheses warning
@ 2021-04-28 5:25 Ian Rogers
2021-04-28 13:20 ` Steven Rostedt
0 siblings, 1 reply; 2+ messages in thread
From: Ian Rogers @ 2021-04-28 5:25 UTC (permalink / raw)
To: linux-trace-devel, Tzvetomir Stoyanov, Steven Rostedt; +Cc: Ian Rogers
Clang 12 generates a warning of:
./tracecmd/trace-stat.c:719:15: error: logical not is only applied to the left hand side of this comparison [-Werror,-Wlogical-not-parentheses]
if (clock && !strcmp(clock, "local") == 0)
^ ~~
./tracecmd/trace-stat.c:719:15: note: add parentheses after the '!' to evaluate the comparison first
if (clock && !strcmp(clock, "local") == 0)
^
( )
./tracecmd/trace-stat.c:719:15: note: add parentheses around left hand side expression to silence this warning
if (clock && !strcmp(clock, "local") == 0)
^
( )
Silence by using "!= 0" as done elsewhere in the code.
Signed-off-by: Ian Rogers <irogers@google.com>
---
tracecmd/trace-stat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tracecmd/trace-stat.c b/tracecmd/trace-stat.c
index 3112787..cb92622 100644
--- a/tracecmd/trace-stat.c
+++ b/tracecmd/trace-stat.c
@@ -716,7 +716,7 @@ static void report_clock(struct buffer_instance *instance)
clock = tracefs_get_clock(tracefs);
/* Default clock is "local", only show others */
- if (clock && !strcmp(clock, "local") == 0)
+ if (clock && strcmp(clock, "local") != 0)
printf("\nClock: %s\n", clock);
free(clock);
--
2.31.1.527.g47e6f16901-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] trace-cmd: Silence a logical-not-parentheses warning
2021-04-28 5:25 [PATCH] trace-cmd: Silence a logical-not-parentheses warning Ian Rogers
@ 2021-04-28 13:20 ` Steven Rostedt
0 siblings, 0 replies; 2+ messages in thread
From: Steven Rostedt @ 2021-04-28 13:20 UTC (permalink / raw)
To: Ian Rogers; +Cc: linux-trace-devel, Tzvetomir Stoyanov
On Tue, 27 Apr 2021 22:25:40 -0700
Ian Rogers <irogers@google.com> wrote:
> Clang 12 generates a warning of:
> ./tracecmd/trace-stat.c:719:15: error: logical not is only applied to the left hand side of this comparison [-Werror,-Wlogical-not-parentheses]
> if (clock && !strcmp(clock, "local") == 0)
> ^ ~~
> ./tracecmd/trace-stat.c:719:15: note: add parentheses after the '!' to evaluate the comparison first
> if (clock && !strcmp(clock, "local") == 0)
> ^
> ( )
> ./tracecmd/trace-stat.c:719:15: note: add parentheses around left hand side expression to silence this warning
> if (clock && !strcmp(clock, "local") == 0)
> ^
> ( )
>
> Silence by using "!= 0" as done elsewhere in the code.
Thanks, this does look like a nice clean up, and not just a removal of a
warning on Clang.
-- Steve
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tracecmd/trace-stat.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tracecmd/trace-stat.c b/tracecmd/trace-stat.c
> index 3112787..cb92622 100644
> --- a/tracecmd/trace-stat.c
> +++ b/tracecmd/trace-stat.c
> @@ -716,7 +716,7 @@ static void report_clock(struct buffer_instance *instance)
> clock = tracefs_get_clock(tracefs);
>
> /* Default clock is "local", only show others */
> - if (clock && !strcmp(clock, "local") == 0)
> + if (clock && strcmp(clock, "local") != 0)
> printf("\nClock: %s\n", clock);
>
> free(clock);
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-04-28 13:20 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-28 5:25 [PATCH] trace-cmd: Silence a logical-not-parentheses warning Ian Rogers
2021-04-28 13:20 ` Steven Rostedt
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).