Re: [Xen-devel] [PATCH 3/3] xen/blkback: Use refcount_t for refcount

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Thu, Aug 08, 2019 at 09:11:00PM +0800, Chuhong Yuan wrote:
> Reference counters are preferred to use refcount_t instead of
> atomic_t.
> This is because the implementation of refcount_t can prevent
> overflows and detect possible use-after-free.
> So convert atomic_t ref counters to refcount_t.

Thanks!

I think there are more reference counters in blkback than
the one you fixed. There's also an inflight field in xen_blkif_ring,
and a pendcnt in pending_req which look like possible candidates to
switch to use refcount_t, have you looked into switching those two
also?

Roger.

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