On 2017年10月24日 09:21, Andi Kleen wrote: > kemi <kemi.w...@intel.com> writes: >> >> I'll see if I can find some >>> time to implement the above in a nice way. >> >> Agree. Maybe something like test_and_set_bit() would be more suitable. > > test_and_set_bit is a very different operation for the CPU because > it is atomic for both. But we want the initial read to not > be atomic. >
I meant to express the meaning of test before setting bit. Apologize to make you confused. > If you add special functions use a different variant that is only > atomic for the set. > > -Andi >
