linux-kernel - [PATCH v2 13/16] mcb: move to_mcb_device() to use container_of

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Message-Id: <20230111113018.459199-14-gregkh@linuxfoundation.org>
Date:   Wed, 11 Jan 2023 12:30:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johannes Thumshirn <morbidrsa@...il.com>
Subject: [PATCH v2 13/16] mcb: move to_mcb_device() to use container_of_const()

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

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

Cc: Johannes Thumshirn <morbidrsa@...il.com>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 include/linux/mcb.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/mcb.h b/include/linux/mcb.h
index f6efb16f9d1b..1e5893138afe 100644
--- a/include/linux/mcb.h
+++ b/include/linux/mcb.h
@@ -76,10 +76,7 @@ struct mcb_device {
 	struct device *dma_dev;
 };
 
-static inline struct mcb_device *to_mcb_device(struct device *dev)
-{
-	return container_of(dev, struct mcb_device, dev);
-}
+#define to_mcb_device(__dev)	container_of_const(__dev, struct mcb_device, dev)
 
 /**
  * struct mcb_driver - MEN Chameleon Bus device driver
-- 
2.39.0