linux-kernel - [PATCH v13 05/13] vdpa: document set_group

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Message-ID: <20260116114231.1474306-6-eperezma@redhat.com>
Date: Fri, 16 Jan 2026 12:42:23 +0100
From: Eugenio Pérez <eperezma@...hat.com>
To: "Michael S . Tsirkin " <mst@...hat.com>
Cc: Stefano Garzarella <sgarzare@...hat.com>,
	virtualization@...ts.linux.dev,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Maxime Coquelin <mcoqueli@...hat.com>,
	Laurent Vivier <lvivier@...hat.com>,
	Yongji Xie <xieyongji@...edance.com>,
	Cindy Lu <lulu@...hat.com>,
	linux-kernel@...r.kernel.org,
	Eugenio Pérez <eperezma@...hat.com>,
	jasowang@...hat.com
Subject: [PATCH v13 05/13] vdpa: document set_group_asid thread safety

Document that the function races with the check of DRIVER_OK.

Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
---
Requested at
https://lore.kernel.org/lkml/CACGkMEvXdV4ukZE6xhLL0sSN70G=AWVQgpRnH98Fr4btzMkK9g@mail.gmail.com/

v12: Reword comment (MST).
---
 include/linux/vdpa.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 4cf21d6e9cfd..2bfe3baa63f4 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -312,7 +312,9 @@ struct vdpa_map_file {
  *				@idx: virtqueue index
  *				Returns the affinity mask
  * @set_group_asid:		Set address space identifier for a
- *				virtqueue group (optional)
+ *				virtqueue group (optional).  Caller must
+ *				prevent this from being executed concurrently
+ *				with set_status.
  *				@vdev: vdpa device
  *				@group: virtqueue group
  *				@asid: address space id for this group
-- 
2.52.0