Re: [RFC PATCH 33/35] Add the Xenbus sysfs and virtual device hotplug driver.

[Alexey Dobriyan <adobriyan@gmail.com>]

> +/* Simplified asprintf. */
> +char *kasprintf(const char *fmt, ...)
> +{
> +	va_list ap;
> +	unsigned int len;
> +	char *p, dummy[1];
> +
> +	va_start(ap, fmt);
> +	/* FIXME: vsnprintf has a bug, NULL should work */
> +	len = vsnprintf(dummy, 0, fmt, ap);
> +	va_end(ap);
> +
> +	p = kmalloc(len + 1, GFP_KERNEL);
> +	if (!p)
> +		return NULL;
> +	va_start(ap, fmt);
> +	vsprintf(p, fmt, ap);
> +	va_end(ap);
> +	return p;
> +}

This should go to lib/

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