lkml.org 
[lkml]   [2017]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 7/9] iio: hid-sensor-accel-3d: Drop unnecessary static
Date
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>

---
drivers/iio/accel/hid-sensor-accel-3d.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
index 43a6cb0..2238a26 100644
--- a/drivers/iio/accel/hid-sensor-accel-3d.c
+++ b/drivers/iio/accel/hid-sensor-accel-3d.c
@@ -347,7 +347,7 @@ static int accel_3d_parse_report(struct platform_device *pdev,
static int hid_accel_3d_probe(struct platform_device *pdev)
{
int ret = 0;
- static const char *name;
+ const char *name;
struct iio_dev *indio_dev;
struct accel_3d_state *accel_state;
const struct iio_chan_spec *channel_spec;
\
 
 \ /
  Last update: 2017-05-04 22:36    [W:1.798 / U:0.528 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site