Re: [PATCH] perf dlfilter: Drop unused variable

Salvatore Bonaccorso
2021-12-08T11:12:04Z

Hi German,

On Wed, Dec 08, 2021 at 10:44:01AM +0000, German Gomez wrote:
>
> On 23/11/2021 21:18, Salvatore Bonaccorso wrote:
> > Compiling tools/perf/dlfilters/dlfilter-test-api-v0.c result in:
> >
> > checking for stdlib.h... dlfilters/dlfilter-test-api-v0.c: In function ‘filter_event’:
> > dlfilters/dlfilter-test-api-v0.c:311:29: warning: unused variable ‘d’ [-Wunused-variable]
> > 311 | struct filter_data *d = data;
> > |
>
> Did you get this warning when issuing "make"? From my side, it generated
> this gcc command so I didn't get it (make DEBUG=1):
>
>   gcc -c -Iinclude  -o dlfilters/dlfilter-test-api-v0.o -fpic dlfilters/dlfilter-test-api-v0.c
>
> Reviewed-by: German Gomez <german.gomez@arm.com>

Only when passing -Wall (this is the case when building the kernel packages in
Debian with additional flags, so this is why this was spotted):

gcc -Wall -c -Iinclude  -o dlfilters/dlfilter-test-api-v0.o -fpic dlfilters/dlfilter-test-api-v0.c
dlfilters/dlfilter-test-api-v0.c: In function ‘filter_event’:
dlfilters/dlfilter-test-api-v0.c:311:29: warning: unused variable ‘d’ [-Wunused-variable]
311 | struct filter_data *d = data;
|

Regards,
Salvatore