Re: [PATCH 4/5] kernel/debug/kdb/kdb_bp.c: drop negativity check on unsigned value

[Dan Carpenter]

On Fri, Jul 18, 2014 at 06:34:52PM +0300, Andrey Utkin wrote:
>  static char *kdb_bptype(kdb_bp_t *bp)
>  {
> -	if (bp->bp_type < 0 || bp->bp_type > 4)
> +	if (bp->bp_type > 4)
>  		return "";

With Smatch, I ignore negative checks in this format.  It's obvious what
the intent is and they are harmless.  Patching them requires a little
review to make sure that someone isn't introducing a bug and can't be
done directly in the email client.

On the other hand, in Smatch I do complain about checks like:

	if (bp->bp_type > 4 || bp->bp_type < 0)

Because only backwards thinking people write checks like that.

regards,
dan carpenter

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