Re: [PATCH 3/3] io_uring: add support for zone-append

From: Alexey Dobriyan
Date: Fri Jun 19 2020 - 11:25:07 EST


> uint64_t val = cqe->res; // assuming non-error here
>
> if (cqe->flags & IORING_CQE_F_ZONE_FOO)
> val |= (cqe->flags >> 16) << 32ULL;

Jens, ULL in shift doesn't do anything for widening the result.
You need

val |= (uint64_t)(cqe->flags >> 16) << 32;