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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-07-01 15:07:37 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-07-03 16:16:54 +0300
commitd69d804845985c29ab5be5a4b3b1f4787893daf8 (patch)
treeda2a783fd130da553c526692669eb847972b86d4 /drivers/media/usb/Kconfig
parent6b521fc111a2ad5ead39776960d3d2d289ce0722 (diff)
downloadlinux-d69d804845985c29ab5be5a4b3b1f4787893daf8.tar.xz
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/media/usb/Kconfig')
0 files changed, 0 insertions, 0 deletions