Re: [PATCH RFC 1/5] vringfd syscall

[Jeremy Fitzhardinge]

Rusty Russell wrote:
> +asmlinkage long sys_vringfd(void __user *addr,
> +			    unsigned num_descs,
> +			    u16 __user *last_used)
> +{
> +	int fd, err;
> +	struct file *filp;
> +	struct vring_info *vr;
> +
> +	/* Must be a power of two, and representable by u16 */
> +	if (!num_descs || (num_descs & (num_descs-1)) || num_descs > 65536) {
>   

65536 doesn't fit in u16.

   J
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