Re: Sparse warning: bitmap.h: bad constant expression

[Dave Olien <dmo@osdl.org>]

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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