linux-kernel - Re: [PATCH v2 4/4] coccinelle: mm: scripts/coccinelle/api/alloc/pool

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Message-ID: <alpine.DEB.2.02.1508022129500.2044@localhost6.localdomain6>
Date:	Sun, 2 Aug 2015 21:30:00 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	"Sean O. Stalley" <sean.stalley@...el.com>
cc:	corbet@....net, vinod.koul@...el.com, bhelgaas@...gle.com,
	Julia.Lawall@...6.fr, Gilles.Muller@...6.fr, nicolas.palix@...g.fr,
	mmarek@...e.cz, akpm@...ux-foundation.org, bigeasy@...utronix.de,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-mm@...ck.org, cocci@...teme.lip6.fr
Subject: Re: [PATCH v2 4/4] coccinelle: mm:
 scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci

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

On Fri, 31 Jul 2015, Sean O. Stalley wrote:

> add [pci|dma]_pool_zalloc coccinelle check.
> replaces instances of [pci|dma]_pool_alloc() followed by memset(0)
> with [pci|dma]_pool_zalloc().
> 
> Signed-off-by: Sean O. Stalley <sean.stalley@...el.com>
> ---
>  .../coccinelle/api/alloc/pool_zalloc-simple.cocci  | 84 ++++++++++++++++++++++
>  1 file changed, 84 insertions(+)
>  create mode 100644 scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci
> 
> diff --git a/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci b/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci
> new file mode 100644
> index 0000000..9b7eb32
> --- /dev/null
> +++ b/scripts/coccinelle/api/alloc/pool_zalloc-simple.cocci
> @@ -0,0 +1,84 @@
> +///
> +/// Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0
> +///
> +// Copyright: (C) 2015 Intel Corp.  GPLv2.
> +// Options: --no-includes --include-headers
> +//
> +// Keywords: dma_pool_zalloc, pci_pool_zalloc
> +//
> +
> +virtual context
> +virtual patch
> +virtual org
> +virtual report
> +
> +//----------------------------------------------------------
> +//  For context mode
> +//----------------------------------------------------------
> +
> +@...ends on context@
> +expression x;
> +statement S;
> +@@
> +
> +* x = \(dma_pool_alloc\|pci_pool_alloc\)(...);
> +  if ((x==NULL) || ...) S
> +* memset(x,0, ...);
> +
> +//----------------------------------------------------------
> +//  For patch mode
> +//----------------------------------------------------------
> +
> +@...ends on patch@
> +expression x;
> +expression a,b,c;
> +statement S;
> +@@
> +
> +- x = dma_pool_alloc(a,b,c);
> ++ x = dma_pool_zalloc(a,b,c);
> +  if ((x==NULL) || ...) S
> +- memset(x,0,...);
> +
> +@...ends on patch@
> +expression x;
> +expression a,b,c;
> +statement S;
> +@@
> +
> +- x = pci_pool_alloc(a,b,c);
> ++ x = pci_pool_zalloc(a,b,c);
> +  if ((x==NULL) || ...) S
> +- memset(x,0,...);
> +
> +//----------------------------------------------------------
> +//  For org and report mode
> +//----------------------------------------------------------
> +
> +@r depends on org || report@
> +expression x;
> +expression a,b,c;
> +statement S;
> +position p;
> +@@
> +
> + x = @p\(dma_pool_alloc\|pci_pool_alloc\)(a,b,c);
> + if ((x==NULL) || ...) S
> + memset(x,0, ...);
> +
> +@...ipt:python depends on org@
> +p << r.p;
> +x << r.x;
> +@@
> +
> +msg="%s" % (x)
> +msg_safe=msg.replace("[","@(").replace("]",")")
> +coccilib.org.print_todo(p[0], msg_safe)
> +
> +@...ipt:python depends on report@
> +p << r.p;
> +x << r.x;
> +@@
> +
> +msg="WARNING: *_pool_zalloc should be used for %s, instead of *_pool_alloc/memset" % (x)
> +coccilib.report.print_report(p[0], msg)
> -- 
> 1.9.1
> 
> 
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