From: Dave Olien <dmo@osdl.org>
To: Petri Koistinen <petri.koistinen@iki.fi>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Sparse warning: bitmap.h: bad constant expression
Date: Mon, 1 Sep 2003 18:57:02 -0700 [thread overview]
Message-ID: <20030902015702.GA10265@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.56.0309012249230.14789@dsl-hkigw4a35.dial.inet.fi>
The problem seems to be that sparse currently will only accept array
declarations with a size that can be evaluated at compile time to
a fixed value. So an array declaration of the form:
int asize;
int data[asize];
will fail. sparse needs to be modified to recognize this type of
declaration with a variable array size. That'll take a few hours of
someone's time to fix.
On Mon, Sep 01, 2003 at 10:59:21PM +0300, Petri Koistinen wrote:
> Hi!
>
> If I try to compile latest kernel with "make C=1" I'll get many warning
> messages from sparse saying:
>
> warning: include/linux/bitmap.h:85:2: bad constant expression
> warning: include/linux/bitmap.h:98:2: bad constant expression
>
> Sparse doesn't seem to like DECLARE_BITMAP macros.
>
> #define DECLARE_BITMAP(name,bits) \
> unsigned long name[BITS_TO_LONGS(bits)]
>
> So what is wrong with this and how it could be fixed so that sparse
> wouldn't complain?
>
> Best regards,
> Petri Koistinen
> -
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next prev parent reply other threads:[~2003-09-02 1:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-01 19:59 Sparse warning: bitmap.h: bad constant expression Petri Koistinen
2003-09-02 1:57 ` Dave Olien [this message]
2003-09-02 9:56 ` Jörn Engel
2003-09-02 10:23 ` Mikael Pettersson
2003-09-02 10:54 ` Jörn Engel
2003-09-02 16:45 ` Linus Torvalds
2003-09-02 20:08 ` Jörn Engel
2003-09-02 17:38 ` Dave Olien
2003-09-02 20:11 ` Jörn Engel
2003-09-02 17:22 ` William Lee Irwin III
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