On 13/03/2015 09:16, Fam Zheng wrote:
>>> > > + if (atomic_cmpxchg(&bounce.in_use, false, true)) {
>> >
>> > atomic_or is enough...
> atomic_cmpxchg is here to take the ownership of bounce iff it is not in use,
> so
> I think it is necessary.
It's changing false to true and true to true, so you can do
if (atomic_or(&bounce.in_use, 1)) {
// was true already
}
Paolo
