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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-01 14:07:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-03 15:16:54 +0200 |
| commit | d69d804845985c29ab5be5a4b3b1f4787893daf8 (patch) | |
| tree | da2a783fd130da553c526692669eb847972b86d4 /drivers/slimbus | |
| parent | MAINTAINERS: add Rust device abstractions to DRIVER CORE (diff) | |
| download | linux-d69d804845985c29ab5be5a4b3b1f4787893daf8.tar.xz linux-d69d804845985c29ab5be5a4b3b1f4787893daf8.zip | |
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>
Diffstat (limited to 'drivers/slimbus')
| -rw-r--r-- | drivers/slimbus/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c index 41e62de1f91f..65e5515f7555 100644 --- a/drivers/slimbus/core.c +++ b/drivers/slimbus/core.c @@ -30,10 +30,10 @@ static const struct slim_device_id *slim_match(const struct slim_device_id *id, return NULL; } -static int slim_device_match(struct device *dev, struct device_driver *drv) +static int slim_device_match(struct device *dev, const struct device_driver *drv) { struct slim_device *sbdev = to_slim_device(dev); - struct slim_driver *sbdrv = to_slim_driver(drv); + const struct slim_driver *sbdrv = to_slim_driver(drv); /* Attempt an OF style match first */ if (of_driver_match_device(dev, drv)) |