From: Christoph Hellwig <hch@lst.de>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Konrad Wilk <konrad.wilk@oracle.com>,
linux-kernel@vger.kernel.org, Bob Liu <bob.liu@oracle.com>,
Paul Durrant <paul.durrant@citrix.com>,
David Vrabel <david.vrabel@citrix.com>,
xen-devel@lists.xenproject.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Use of VM_IOREMAP in xenbus
Date: Thu, 9 Apr 2020 08:18:46 +0200 [thread overview]
Message-ID: <20200409061846.GA30241@lst.de> (raw)
Hi Wei,
commit ccc9d90a9a8b5 ("xenbus_client: Extend interface to support
multi-page ring") addes a use of vmap in what is now
xenbus_map_ring_valloc_hvm, and uses the VM_IOREMAP flag that is
only really intended for implementing ioremap. Do you remember
what the reason is that this flag was used?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Bob Liu <bob.liu@oracle.com>,
Paul Durrant <paul.durrant@citrix.com>,
Konrad Wilk <konrad.wilk@oracle.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
David Vrabel <david.vrabel@citrix.com>,
Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
Subject: Use of VM_IOREMAP in xenbus
Date: Thu, 9 Apr 2020 08:18:46 +0200 [thread overview]
Message-ID: <20200409061846.GA30241@lst.de> (raw)
Hi Wei,
commit ccc9d90a9a8b5 ("xenbus_client: Extend interface to support
multi-page ring") addes a use of vmap in what is now
xenbus_map_ring_valloc_hvm, and uses the VM_IOREMAP flag that is
only really intended for implementing ioremap. Do you remember
what the reason is that this flag was used?
next reply other threads:[~2020-04-09 6:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-09 6:18 Christoph Hellwig [this message]
2020-04-09 6:18 ` Use of VM_IOREMAP in xenbus Christoph Hellwig
2020-04-09 6:37 ` Jürgen Groß
2020-04-09 6:37 ` Jürgen Groß
2020-04-09 14:28 ` Wei Liu
2020-04-09 14:28 ` Wei Liu
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