linux-kernel - Re: [RFC PATCH 14/16] xen/blk: gnttab, evtchn, xenbus API changes

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Message-ID: <1a4e2fe7-ed2d-05f1-9f2f-f0a940b30151@suse.com>
Date:   Mon, 17 Jun 2019 12:14:14 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Ankur Arora <ankur.a.arora@...cle.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc:     pbonzini@...hat.com, boris.ostrovsky@...cle.com,
        konrad.wilk@...cle.com, sstabellini@...nel.org,
        joao.m.martins@...cle.com
Subject: Re: [RFC PATCH 14/16] xen/blk: gnttab, evtchn, xenbus API changes

On 09.05.19 19:25, Ankur Arora wrote:
> For the most part, we now pass xenhost_t * as a parameter.
> 
> Co-developed-by: Joao Martins <joao.m.martins@...cle.com>
> Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>

I don't see how this can be a patch on its own.

The only way to be able to use a patch for each driver would be to
keep the original grant-, event- and xenbus-interfaces and add the
new ones taking xenhost * with a new name. The original interfaces
could then use xenhost_default and you can switch them to the new
interfaces one by one. The last patch could then remove the old
interfaces when there is no user left.

Juergen