linux-kernel - Re: [PATCH 03/11] mtd: physmap

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Message-ID: <20170717215822.3c7a0d86@bbrezillon>
Date:   Mon, 17 Jul 2017 21:58:22 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Julia Lawall <Julia.Lawall@...6.fr>
Cc:     David Woodhouse <dwmw2@...radead.org>, keescook@...omium.org,
        kernel-janitors@...r.kernel.org,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/11] mtd: physmap_of: Drop unnecessary static

Le Sat, 15 Jul 2017 22:07:38 +0200,
Julia Lawall <Julia.Lawall@...6.fr> a écrit :

> 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@...6.fr>

Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>

> 
> ---
> These patches are all independent of each other.
> 
>  drivers/mtd/maps/physmap_of_versatile.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff -u -p a/drivers/mtd/maps/physmap_of_versatile.c b/drivers/mtd/maps/physmap_of_versatile.c
> --- a/drivers/mtd/maps/physmap_of_versatile.c
> +++ b/drivers/mtd/maps/physmap_of_versatile.c
> @@ -97,7 +97,7 @@ static const struct of_device_id ebi_mat
>  static int ap_flash_init(struct platform_device *pdev)
>  {
>  	struct device_node *ebi;
> -	static void __iomem *ebi_base;
> +	void __iomem *ebi_base;
>  	u32 val;
>  	int ret;
>  
>