On Sat, Nov 29, 2025 at 05:01:16PM +0800, zhangshida wrote: > From: Shida Zhang <[email protected]> > > Andreas point out that multiple completions can race setting > bi_status. > > The check (parent->bi_status) and the subsequent write are not an > atomic operation. The value of parent->bi_status could have changed > between the time you read it for the if check and the time you write > to it. So we use cmpxchg to fix the race, as suggested by Christoph.
Looks good: Reviewed-by: Christoph Hellwig <[email protected]>
