linux/drivers/vfio/mdev
Greg Kroah-Hartman d69d804845 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 <rafael@kernel.org>
Reviewed-by: Alex Elder <elder@kernel.org>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-07-03 15:16:54 +02:00
..
Kconfig vfio-mdev: turn VFIO_MDEV into a selectable symbol 2023-01-23 11:26:29 -07:00
Makefile vfio/mdev: Remove vfio_mdev.c 2022-04-21 07:36:56 -04:00
mdev_core.c vfio/mdev: Move the compat_class initialization to module init 2023-06-27 12:05:26 -06:00
mdev_driver.c driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
mdev_private.h vfio: mdev: make mdev_bus_type const 2024-02-22 12:19:33 -07:00
mdev_sysfs.c vfio/mdev: Fix a null-ptr-deref bug for mdev_unregister_parent() 2023-09-22 12:48:04 -06:00