linux-kernel - [PATCH v2 03/16] platform/surface: aggregator: move to_ssam_device() to use container_of

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Date:   Wed, 11 Jan 2023 12:30:05 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH v2 03/16] platform/surface: aggregator: move to_ssam_device() to use container_of_const()

The driver core is changing to pass some pointers as const, so move
to_ssam_device() to use container_of_const() to handle this change.
to_ssam_device() now properly keeps the const-ness of the pointer passed
into it, while as before it could be lost.

Cc: Maximilian Luz <luzmaximilian@...il.com>
Cc: platform-driver-x86@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 include/linux/surface_aggregator/device.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/surface_aggregator/device.h b/include/linux/surface_aggregator/device.h
index 46c45d1b6368..24151a0e2c96 100644
--- a/include/linux/surface_aggregator/device.h
+++ b/include/linux/surface_aggregator/device.h
@@ -229,10 +229,7 @@ static inline bool is_ssam_device(struct device *d)
  * Return: Returns a pointer to the &struct ssam_device wrapping the given
  * device @d.
  */
-static inline struct ssam_device *to_ssam_device(struct device *d)
-{
-	return container_of(d, struct ssam_device, dev);
-}
+#define to_ssam_device(d)	container_of_const(d, struct ssam_device, dev)
 
 /**
  * to_ssam_device_driver() - Casts the given device driver to a SSAM client
-- 
2.39.0