Re: [PATCH] block: switch to atomic_t for request references

[Peter Zijlstra]

On Wed, Dec 08, 2021 at 10:50:10AM -0800, Linus Torvalds wrote:
> On Wed, Dec 8, 2021 at 10:44 AM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> >
> > From testing xadd had different flags from add; I've not yet looked at
> > the SDM to see what it said on the matter.
> 
> That should not be the case. Just checked, and it just says
> 
>   "The CF, PF, AF, SF, ZF, and OF flags are set according to the
> result of the addition, which is stored in the destination operand"

I got the constraints wrong :/ They match now.