Re: hash.h warnings

On Mar 25, 2007, at 1:38 AM, Andrew Thompson wrote:

Hi,


There was a discussion late last year about how to fix the warnings in
sys/sys/hash.h.

http://lists.freebsd.org/pipermail/freebsd-net/2006-October/ 012098.html

There were a few suggestions put forward but nothing was ever committed. I
need to include this file in the kernel for a new driver but do not know
enough about this type of warning to fix it. Can anyone recommend the correct
fix?

@/sys/hash.h: In function `hash32_stre':
@/sys/hash.h:97: warning: cast discards qualifiers from pointer target type
@/sys/hash.h: In function `hash32_strne':
@/sys/hash.h:116: warning: cast discards qualifiers from pointer target type



cheers,
Andrew

After looking at the source it appears that part of the problem stems from the fact that p is an unsigned char pointer, where ep is a signed char double pointer. So you're losing some precision in the process (hence where the error's coming from I believe).

So, if you modified buf (the pointer that p is pointing to) or ep to be compatible with one another, you probably wouldn't get this warning..

-Garrett
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