linux-kernel - Re: [PATCH 16/16] fix handling of integer constant expressions

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Date:	Wed, 27 Jun 2007 07:50:18 -0700
From:	Josh Triplett <josht@...ux.vnet.ibm.com>
To:	Al Viro <viro@....linux.org.uk>
Cc:	Neil Booth <neil@...kokuya.co.uk>,
	Josh Triplett <josh@...edesktop.org>,
	Segher Boessenkool <segher@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-sparse@...r.kernel.org
Subject: Re: [PATCH 16/16] fix handling of integer constant expressions

On Wed, 2007-06-27 at 14:18 +0100, Al Viro wrote:
> --- a/expand.c
> +++ b/expand.c
[...]
> @@ -488,12 +490,15 @@ static int expand_conditional(struct expression *expr)
> 
>  	cond_cost = expand_expression(cond);
>  	if (cond->type == EXPR_VALUE) {
> +		unsigned flags = expr->flags;
>  		if (!cond->value)
>  			true = false;
>  		if (!true)
>  			true = cond;
> +		cost = expand_expression(*true);
>  		*expr = *true;
> -		return expand_expression(expr);
> +		expr->flags = flags;
> +		return cost;

This passes an incorrect type to expand_expression; it wants a struct
expression *, but *true has type struct expression; did you want to pass
true rather than *true?

- Josh Triplett


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