[PATCH 2/9] mtd: physmap_of: Drop unnecessary static

Julia Lawall
2017-05-04T20:10:47Z

Drop static on a local variable, when the variable is initialized before
any 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
835 80 8 923 39b drivers/mtd/maps/physmap_of_gemini.o

after:
text data bss dec hex filename
823 80 0 903 387 drivers/mtd/maps/physmap_of_gemini.o

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
drivers/mtd/maps/physmap_of_gemini.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/maps/physmap_of_gemini.c b/drivers/mtd/maps/physmap_of_gemini.c
index 9d371cd..05b286b 100644
--- a/drivers/mtd/maps/physmap_of_gemini.c
+++ b/drivers/mtd/maps/physmap_of_gemini.c
@@ -59,7 +59,7 @@ int of_flash_probe_gemini(struct platform_device *pdev,
struct device_node *np,
struct map_info *map)
{
- static struct regmap *rmap;
+ struct regmap *rmap;
struct device *dev = &pdev->dev;
u32 val;
int ret;