linux-kernel - Re: [PATCH RESEND 4/4] coccinelle: api: add spatch to prevent unnecessary .owner

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Date:	Tue, 28 Oct 2014 21:58:05 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Wolfram Sang <wsa@...-dreams.de>
cc:	Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 4/4] coccinelle: api: add spatch to prevent
 unnecessary .owner

Acked-by: Julia Lawall <julia.lawall@...6.fr>

On Tue, 28 Oct 2014, Wolfram Sang wrote:

> There are calls which silently set the owner of a module. This is the
> preferred way [1], so avoid setting it manually. Currently, we only care
> about platform drivers, but there might be more calls to be added later.
> 
> [1] https://lkml.org/lkml/2014/10/12/87
> 
> Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
> ---
>  scripts/coccinelle/api/platform_no_drv_owner.cocci | 106 +++++++++++++++++++++
>  1 file changed, 106 insertions(+)
>  create mode 100644 scripts/coccinelle/api/platform_no_drv_owner.cocci
> 
> diff --git a/scripts/coccinelle/api/platform_no_drv_owner.cocci b/scripts/coccinelle/api/platform_no_drv_owner.cocci
> new file mode 100644
> index 000000000000..e065b9e714fc
> --- /dev/null
> +++ b/scripts/coccinelle/api/platform_no_drv_owner.cocci
> @@ -0,0 +1,106 @@
> +/// Remove .owner field if calls are used which set it automatically
> +///
> +// Confidence: High
> +// Copyright: (C) 2014 Wolfram Sang. GPL v2.
> +
> +virtual patch
> +virtual context
> +virtual org
> +virtual report
> +
> +@...ch1@
> +declarer name module_platform_driver;
> +declarer name module_platform_driver_probe;
> +identifier __driver;
> +@@
> +(
> +	module_platform_driver(__driver);
> +|
> +	module_platform_driver_probe(__driver, ...);
> +)
> +
> +@...1 depends on match1 && patch && !context && !org && !report@
> +identifier match1.__driver;
> +@@
> +	static struct platform_driver __driver = {
> +		.driver = {
> +-			.owner = THIS_MODULE,
> +		}
> +	};
> +
> +@...ch2@
> +identifier __driver;
> +@@
> +(
> +	platform_driver_register(&__driver)
> +|
> +	platform_driver_probe(&__driver, ...)
> +|
> +	platform_create_bundle(&__driver, ...)
> +)
> +
> +@...2 depends on match2 && patch && !context && !org && !report@
> +identifier match2.__driver;
> +@@
> +	static struct platform_driver __driver = {
> +		.driver = {
> +-			.owner = THIS_MODULE,
> +		}
> +	};
> +
> +// ----------------------------------------------------------------------------
> +
> +@...1_context depends on match1 && !patch && (context || org || report)@
> +identifier match1.__driver;
> +position j0;
> +@@
> +
> + 	static struct platform_driver __driver = {
> +		.driver = {
> +*			.owner@j0 = THIS_MODULE,
> +		}
> +	};
> +
> +@...2_context depends on match2 && !patch && (context || org || report)@
> +identifier match2.__driver;
> +position j0;
> +@@
> +
> + 	static struct platform_driver __driver = {
> +		.driver = {
> +*			.owner@j0 = THIS_MODULE,
> +		}
> +	};
> +
> +// ----------------------------------------------------------------------------
> +
> +@...ipt:python fix1_org depends on org@
> +j0 << fix1_context.j0;
> +@@
> +
> +msg = "No need to set .owner here. The core will do it."
> +coccilib.org.print_todo(j0[0], msg)
> +
> +@...ipt:python fix2_org depends on org@
> +j0 << fix2_context.j0;
> +@@
> +
> +msg = "No need to set .owner here. The core will do it."
> +coccilib.org.print_todo(j0[0], msg)
> +
> +// ----------------------------------------------------------------------------
> +
> +@...ipt:python fix1_report depends on report@
> +j0 << fix1_context.j0;
> +@@
> +
> +msg = "No need to set .owner here. The core will do it."
> +coccilib.report.print_report(j0[0], msg)
> +
> +@...ipt:python fix2_report depends on report@
> +j0 << fix2_context.j0;
> +@@
> +
> +msg = "No need to set .owner here. The core will do it."
> +coccilib.report.print_report(j0[0], msg)
> +
> -- 
> 2.0.0
> 
> 
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