[08/11] ata: Drop unnecessary static

Message ID 1500149266-32357-9-git-send-email-Julia.Lawall@lip6.fr
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

Julia Lawall July 15, 2017, 8:07 p.m.
Drop static on a local variable, when the variable is initialized before
any possible use.  Thus, the static has no benefit.

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>

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

---
These patches are all independent of each other.

 drivers/ata/sata_gemini.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


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Comments

Linus Walleij Aug. 2, 2017, 8:23 a.m. | #1
On Sat, Jul 15, 2017 at 10:07 PM, Julia Lawall <Julia.Lawall@lip6.fr> wrote:

> Drop static on a local variable, when the variable is initialized before
> any possible use.  Thus, the static has no benefit.
>
> 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>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Acked-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
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Tejun Heo Aug. 2, 2017, 3:12 p.m. | #2
On Sat, Jul 15, 2017 at 10:07:43PM +0200, Julia Lawall wrote:
> Drop static on a local variable, when the variable is initialized before
> any possible use.  Thus, the static has no benefit.
> 
> 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>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Applied to libata/for-4.14.

Thanks.

Patch

diff -u -p a/drivers/ata/sata_gemini.c b/drivers/ata/sata_gemini.c
--- a/drivers/ata/sata_gemini.c
+++ b/drivers/ata/sata_gemini.c
@@ -305,7 +305,7 @@  static int gemini_sata_probe(struct plat
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	struct sata_gemini *sg;
-	static struct regmap *map;
+	struct regmap *map;
 	struct resource *res;
 	enum gemini_muxmode muxmode;
 	u32 gmode;