linux/drivers/tty/serdev
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
..
core.c driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
Kconfig tty: add SPDX identifiers to Kconfig and Makefiles 2019-04-04 18:48:43 +02:00
Makefile Revert "serdev: simplify Makefile" 2019-12-18 15:01:41 +01:00
serdev-ttyport.c treewide, serdev: change receive_buf() return type to size_t 2024-01-27 18:13:53 -08:00