[PATCH v2 10/16] drivers: hv: move device_to_hv_device to use container_of_const()

[PATCH v2 10/16] drivers: hv: move device_to_hv_device to use container_of_const()

[Greg Kroah-Hartman]

The driver core is changing to pass some pointers as const, so move
device_to_hv_device() to use container_of_const() to handle this change.

device_to_hv_device() now properly keeps the const-ness of the pointer
passed into it, while as before it could be lost.

Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: linux-hyperv@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/hyperv.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 85f7c5a63aa6..8430e27f3c3f 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -1309,10 +1309,7 @@ struct hv_device {
 };
 
 
-static inline struct hv_device *device_to_hv_device(struct device *d)
-{
-	return container_of(d, struct hv_device, device);
-}
+#define device_to_hv_device(d)	container_of_const(d, struct hv_device, device)
 
 static inline struct hv_driver *drv_to_hv_drv(struct device_driver *d)
 {
-- 
2.39.0

Re: [PATCH v2 10/16] drivers: hv: move device_to_hv_device to use container_of_const()

[Wei Liu]

On Wed, Jan 11, 2023 at 12:30:12PM +0100, Greg Kroah-Hartman wrote:
> The driver core is changing to pass some pointers as const, so move
> device_to_hv_device() to use container_of_const() to handle this change.
> 
> device_to_hv_device() now properly keeps the const-ness of the pointer
> passed into it, while as before it could be lost.
> 
> Cc: "K. Y. Srinivasan" <kys@microsoft.com>
> Cc: Haiyang Zhang <haiyangz@microsoft.com>
> Cc: Wei Liu <wei.liu@kernel.org>
> Cc: Dexuan Cui <decui@microsoft.com>
> Cc: linux-hyperv@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Acked-by: Wei Liu <wei.liu@kernel.org>