media: tuners: remove unnecessary static in simple_dvb_configure()
authorGustavo A. R. Silva <garsilva@embeddedor.com>
Wed, 5 Jul 2017 18:23:55 +0000 (14:23 -0400)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Wed, 19 Jul 2017 19:02:27 +0000 (15:02 -0400)
commit6ad33dec835693e38c1994cedbd3c404782e84fb
treebe787d9ba5e7536521fd015f93d445e5b22855c7
parent72c6efb0d3fb0eff8b13c14dfcebbd8e8e63c1e4
media: tuners: remove unnecessary static in simple_dvb_configure()

Remove unnecessary static on local variable t_params.
Such variable is initialized before being used,
on every execution path throughout the function.
The static has no benefit and, removing it reduces
the code size.

This issue was detected using Coccinelle and the following semantic patch:

@bad exists@
position p;
identifier x;
type T;
@@

static T x@p;
...
x = <+...x...+>

@@
identifier x;
expression e;
type T;
position p != bad.p;
@@

-static
 T x@p;
 ... when != x
     when strict
?x = e;

In the following log you can see the difference in the code size. Also,
there is a significant difference in the bss segment. This log is the
output of the size command, before and after the code change:

before:
   text    data     bss     dec     hex filename
  23314    3640     832   27786    6c8a drivers/media/tuners/tuner-simple.o

after:
   text    data     bss     dec     hex filename
  23257    3552     768   27577    6bb9 drivers/media/tuners/tuner-simple.o

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
drivers/media/tuners/tuner-simple.c