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From: Joe Perches <joe@perches.com>
To: Julia Lawall <julia.lawall@inria.fr>
Cc: cocci <cocci@systeme.lip6.fr>,
	LKML <linux-kernel@vger.kernel.org>,
	kernel-janitors@vger.kernel.org
Subject: Re: cocci script to convert linux-kernel allocs with BITS_TO_LONGS to bitmap_alloc
Date: Sat, 10 Jul 2021 13:02:36 -0700	[thread overview]
Message-ID: <afd3a282ca57a4a400c8bae9879a7c57bc507c59.camel@perches.com> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2107102149140.46528@hadrien>

On Sat, 2021-07-10 at 21:50 +0200, Julia Lawall wrote:
> On Fri, 9 Jul 2021, Joe Perches wrote:
> 
> > Here is a cocci script to convert various types of bitmap allocations
> > that use BITS_TO_LONGS to the more typical bitmap_alloc functions.
> > 
> > Perhaps something like it could be added to scripts/coccinelle.
> > The diff produced by the script is also below.
> > 
> > $ cat bitmap_allocs.cocci
> > // typical uses of bitmap allocations
[]
> > @@
> > expression val;
> > expression e1;
> > expression e2;
> > @@
> > 
> > -	val = kcalloc(BITS_TO_LONGS(e1), sizeof(*val), e2)
> > +	val = bitmap_zalloc(e1, e2)
> 
> Is there something that guarantees that val has a type that has a size that
> is the same as a long?

no, but afaict, all do.



WARNING: multiple messages have this Message-ID (diff)
From: Joe Perches <joe@perches.com>
To: Julia Lawall <julia.lawall@inria.fr>
Cc: kernel-janitors@vger.kernel.org, cocci <cocci@systeme.lip6.fr>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [Cocci] cocci script to convert linux-kernel allocs with BITS_TO_LONGS to bitmap_alloc
Date: Sat, 10 Jul 2021 13:02:36 -0700	[thread overview]
Message-ID: <afd3a282ca57a4a400c8bae9879a7c57bc507c59.camel@perches.com> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2107102149140.46528@hadrien>

On Sat, 2021-07-10 at 21:50 +0200, Julia Lawall wrote:
> On Fri, 9 Jul 2021, Joe Perches wrote:
> 
> > Here is a cocci script to convert various types of bitmap allocations
> > that use BITS_TO_LONGS to the more typical bitmap_alloc functions.
> > 
> > Perhaps something like it could be added to scripts/coccinelle.
> > The diff produced by the script is also below.
> > 
> > $ cat bitmap_allocs.cocci
> > // typical uses of bitmap allocations
[]
> > @@
> > expression val;
> > expression e1;
> > expression e2;
> > @@
> > 
> > -	val = kcalloc(BITS_TO_LONGS(e1), sizeof(*val), e2)
> > +	val = bitmap_zalloc(e1, e2)
> 
> Is there something that guarantees that val has a type that has a size that
> is the same as a long?

no, but afaict, all do.


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  reply	other threads:[~2021-07-10 20:02 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-09 20:39 cocci script to convert linux-kernel allocs with BITS_TO_LONGS to bitmap_alloc Joe Perches
2021-07-09 20:39 ` [Cocci] " Joe Perches
2021-07-10 19:50 ` Julia Lawall
2021-07-10 19:50   ` [Cocci] " Julia Lawall
2021-07-10 20:02   ` Joe Perches [this message]
2021-07-10 20:02     ` Joe Perches
2021-07-10 20:09     ` Julia Lawall
2021-07-10 20:09       ` [Cocci] " Julia Lawall
2021-07-13 21:33     ` Julia Lawall
2021-07-13 21:33       ` [Cocci] " Julia Lawall
2021-07-13 23:09       ` Joe Perches
2021-07-13 23:09         ` [Cocci] " Joe Perches
2021-07-14  6:22         ` Julia Lawall
2021-07-14  6:22           ` [Cocci] " Julia Lawall

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