> return (TX_RING_SIZE - (bp->tx_head - bp->tx_tail) & (TX_RING_SIZE -
> 1));
Is equivalent to:
return (bp->tx_tail - bp->tx_head) & (TX_RING_SIZE - 1));
David
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On 10/31/2012 10:59 AM, Nicolas Ferre :
> On 10/30/2012 07:22 PM, Håvard Skinnemoen :
>> On Tue, Oct 30, 2012 at 4:12 AM, David Laight
>> wrote:
Instead of masking head and tail every time we increment them, just let
them
wrap through UINT_MAX and mask them when subscripting. Add
> On Tue, Oct 30, 2012 at 4:12 AM, David Laight wrote:
> >> Instead of masking head and tail every time we increment them, just let
> >> them
> >> wrap through UINT_MAX and mask them when subscripting. Add simple accessor
> >> functions to do the subscripting properly to minimize the chances of
On 10/30/2012 07:22 PM, Håvard Skinnemoen :
> On Tue, Oct 30, 2012 at 4:12 AM, David Laight wrote:
>>> Instead of masking head and tail every time we increment them, just let them
>>> wrap through UINT_MAX and mask them when subscripting. Add simple accessor
>>> functions to do the subscripting pr
On Tue, Oct 30, 2012 at 4:12 AM, David Laight wrote:
>> Instead of masking head and tail every time we increment them, just let them
>> wrap through UINT_MAX and mask them when subscripting. Add simple accessor
>> functions to do the subscripting properly to minimize the chances of messing
>> this
> Instead of masking head and tail every time we increment them, just let them
> wrap through UINT_MAX and mask them when subscripting. Add simple accessor
> functions to do the subscripting properly to minimize the chances of messing
> this up.
...
> +static unsigned int macb_tx_ring_avail(struct
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