[openib-general] integer overflow

[Michael S. Tsirkin]

> Quoting Roland Dreier <rdreier at cisco.com>:
> Subject: Re: integer overflow
> 
>  > 	while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
>  > 
>  > seems to rely on integer overflow which seems to be
>  > undefined behaviour.
> 
> tx_tail and tx_head are unsigned, and overflow is defined for unsigned
> integers.

Yes but we cast them to signed int here - no?


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MST