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 --- drivers/bus/moxtet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/bus/moxtet.c') diff --git a/drivers/bus/moxtet.c b/drivers/bus/moxtet.c index 641c1a6adc8a..8412406c4f1d 100644 --- a/drivers/bus/moxtet.c +++ b/drivers/bus/moxtet.c @@ -83,10 +83,10 @@ static const struct attribute_group *moxtet_dev_groups[] = { NULL, }; -static int moxtet_match(struct device *dev, struct device_driver *drv) +static int moxtet_match(struct device *dev, const struct device_driver *drv) { struct moxtet_device *mdev = to_moxtet_device(dev); - struct moxtet_driver *tdrv = to_moxtet_driver(drv); + const struct moxtet_driver *tdrv = to_moxtet_driver(drv); const enum turris_mox_module_id *t; if (of_driver_match_device(dev, drv)) -- cgit