[PATCH] tuners: remove unnecessary static in simple_dvb_configure()

From: Gustavo A. R. Silva
Date: Wed Jul 05 2017 - 14:24:13 EST

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;

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:

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

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@xxxxxxxxxxxxxx>
drivers/media/tuners/tuner-simple.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/tuners/tuner-simple.c b/drivers/media/tuners/tuner-simple.c
index 3339b13..cf44d36 100644
--- a/drivers/media/tuners/tuner-simple.c
+++ b/drivers/media/tuners/tuner-simple.c
@@ -846,7 +846,7 @@ static u32 simple_dvb_configure(struct dvb_frontend *fe, u8 *buf,
/* This function returns the tuned frequency on success, 0 on error */
struct tuner_simple_priv *priv = fe->tuner_priv;
struct tunertype *tun = priv->tun;
- static struct tuner_params *t_params;
+ struct tuner_params *t_params;
u8 config, cb;
u32 div;
int ret;