Re: [patch] warn-on-once.patch

[Michal Schmidt]

On Sat 26. of November 2005 15:52 Ingo Molnar wrote:
> - introduce WARN_ON_ONCE(cond)
> [...]
> +#define WARN_ON_ONCE(condition)		\
> +do {					\
> +	static int warn_once = 1;	\
> +					\
> +	if (condition) {		\
> +		warn_once = 0;		\
> +		WARN_ON(1);		\
> +	}				\
> +} while (0);
> +
>  #endif

That can't be right. The variable warn_once is only written to. Should the 
condition be: if (condition && warn_once)  ?
Or even better with inverted logic (so that the variable is initialized to 0):

static int warned_once;
if (condition && !warned_once) {
	warned_once = 1;
	WARN_ON(1);
}


Michal
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