iio: hid-sensor-accel-3d: Drop unnecessary static
authorJulia Lawall <Julia.Lawall@lip6.fr>
Thu, 4 May 2017 20:10:52 +0000 (22:10 +0200)
committerJonathan Cameron <jic23@kernel.org>
Sun, 7 May 2017 12:56:36 +0000 (13:56 +0100)
commit40f4b1f031a71dcf111f64a3c20ee0361b96d862
tree60380cb3c32da8ececb6cf2b726d8f9195241b9f
parent8d043004838daff5e75aa6705380e02dd17544d0
iio: hid-sensor-accel-3d: Drop unnecessary static

Drop static on a local variable, when the variable is initialized before
use, on every possible execution path through the function.  The static has
no benefit, and dropping it reduces the code size.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@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;
// </smpl>

The change in code size is indicates by the following output from the size
command.

before:
   text    data     bss     dec     hex filename
   3879     512       8    4399    112f drivers/iio/accel/hid-sensor-accel-3d.o

after:
   text    data     bss     dec     hex filename
   3863     512       0    4375    1117 drivers/iio/accel/hid-sensor-accel-3d.o

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/iio/accel/hid-sensor-accel-3d.c