linux-kernel - Re: [PATCHv2] coccinelle: api: add vma

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Date:	Sun, 17 May 2015 22:25:43 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Dmitry Kalinkin <dmitry.kalinkin@...il.com>
cc:	linux-kernel@...r.kernel.org, cocci@...teme.lip6.fr,
	Julia Lawall <Julia.Lawall@...6.fr>,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Michal Marek <mmarek@...e.cz>
Subject: Re: [PATCHv2] coccinelle: api: add vma_pages.cocci

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

Thanks!

On Sun, 17 May 2015, Dmitry Kalinkin wrote:

> This semantic patch replaces explicit computations of vma page count
> with explicit function call.
> 
> Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@...il.com>
> ---
>  scripts/coccinelle/api/vma_pages.cocci | 60 ++++++++++++++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 scripts/coccinelle/api/vma_pages.cocci
> 
> diff --git a/scripts/coccinelle/api/vma_pages.cocci b/scripts/coccinelle/api/vma_pages.cocci
> new file mode 100644
> index 0000000..3e52e11
> --- /dev/null
> +++ b/scripts/coccinelle/api/vma_pages.cocci
> @@ -0,0 +1,60 @@
> +///
> +/// Use vma_pages function on vma object instead of explicit computation.
> +///
> +//  Confidence: High
> +//  Keywords: vma_pages vma
> +//  Comment: Based on resource_size.cocci
> +
> +virtual context
> +virtual patch
> +virtual org
> +virtual report
> +
> +//----------------------------------------------------------
> +//  For context mode
> +//----------------------------------------------------------
> +
> +@...ontext depends on context && !patch && !org && !report@
> +struct vm_area_struct *vma;
> +@@
> +
> +* (vma->vm_end - vma->vm_start) >> PAGE_SHIFT
> +
> +//----------------------------------------------------------
> +//  For patch mode
> +//----------------------------------------------------------
> +
> +@...atch depends on !context && patch && !org && !report@
> +struct vm_area_struct *vma;
> +@@
> +
> +- ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT)
> ++ vma_pages(vma)
> +
> +//----------------------------------------------------------
> +//  For org mode
> +//----------------------------------------------------------
> +
> +@...rg depends on !context && !patch && (org || report)@
> +struct vm_area_struct *vma;
> +position p;
> +@@
> +
> +  (vma->vm_end@p - vma->vm_start) >> PAGE_SHIFT
> +
> +@...ipt:python depends on report@
> +p << r_org.p;
> +x << r_org.vma;
> +@@
> +
> +msg="WARNING: Consider using vma_pages helper on %s" % (x)
> +coccilib.report.print_report(p[0], msg)
> +
> +@...ipt:python depends on org@
> +p << r_org.p;
> +x << r_org.vma;
> +@@
> +
> +msg="WARNING: Consider using vma_pages helper on %s" % (x)
> +msg_safe=msg.replace("[","@(").replace("]",")")
> +coccilib.org.print_todo(p[0], msg_safe)
> -- 
> 1.8.3.1
> 
> 
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