From d69d804845985c29ab5be5a4b3b1f4787893daf8 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Mon, 1 Jul 2024 14:07:37 +0200 Subject: driver core: have match() callback in struct bus_type take a const * In the match() callback, the struct device_driver * should not be changed, so change the function callback to be a const *. This is one step of many towards making the driver core safe to have struct device_driver in read-only memory. Because the match() callback is in all busses, all busses are modified to handle this properly. This does entail switching some container_of() calls to container_of_const() to properly handle the constant *. For some busses, like PCI and USB and HV, the const * is cast away in the match callback as those busses do want to modify those structures at this point in time (they have a local lock in the driver structure.) That will have to be changed in the future if they wish to have their struct device * in read-only-memory. Cc: Rafael J. Wysocki Reviewed-by: Alex Elder Acked-by: Sumit Garg Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh Signed-off-by: Greg Kroah-Hartman --- include/linux/maple.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/maple.h') diff --git a/include/linux/maple.h b/include/linux/maple.h index 9aae44efcfd4..3be4e567473c 100644 --- a/include/linux/maple.h +++ b/include/linux/maple.h @@ -97,7 +97,7 @@ int maple_add_packet(struct maple_device *mdev, u32 function, void maple_clear_dev(struct maple_device *mdev); #define to_maple_dev(n) container_of(n, struct maple_device, dev) -#define to_maple_driver(n) container_of(n, struct maple_driver, drv) +#define to_maple_driver(n) container_of_const(n, struct maple_driver, drv) #define maple_get_drvdata(d) dev_get_drvdata(&(d)->dev) #define maple_set_drvdata(d,p) dev_set_drvdata(&(d)->dev, (p)) -- cgit v1.2.3