On Wed, 2017-03-15 at 16:12 -0600, Jason Gunthorpe wrote:
> @@ -1013,7 +1012,7 @@ int close(int socket)
> return ret;
> }
>
> - if (atomic_dec(&fdi->refcnt))
> + if (atomic_fetch_sub(&fdi->refcnt, 1))
> return 0;
>
> idm_clear(&idm, socket);
> @@ -898,7 +898,7 @@ static int rs_create_ep(struct rsocket *rs)
>
> static void rs_release_iomap_mr(struct rs_iomap_mr *iomr)
> {
> - if (atomic_dec(&iomr->refcnt))
> + if (atomic_fetch_sub(&iomr->refcnt, 1))
> return;
>
> dlist_remove(&iomr->entry);
Hello Jason,
In the gcc documentation I read that __sync_sub_and_fetch() (used to
implement atomic_dec()) returns the new value. In the C11 standard I read
that atomic_fetch_sub() returns the old value. Do you agree with this?
Thanks,
Bart.--
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