The kernel provides the macro MODULE_DEVICE_TABLE() which can help driver authors to generate the appropriate MODULE_ALIAS() output. The WMI device type is currently not supported by MODULE_DEVICE_TABLE(). While using MODULE_DEVICE_TABLE() does increase the complexity as well as spreading out the implementation across the kernel, it does come with some benefits too; * It makes different drivers look more similar; if you can specify the array of device_ids any device type specific input to MODULE_ALIAS() will automatically be generated for you. * It helps each driver avoid keeping multiple versions of the same information in sync. That is, both the array of device_ids and the potential multitude of MODULE_ALIAS()'s. * Other things eg. [2] This patchset adds WMI support to MODULE_DEVICE_TABLE(). [PATCH 1/3]: prepare struct wmi_device_id [PATCH 2/3]: add support [PATCH 3+/3]: update existing drivers to use MODULE_DEVICE_TABLE() Changes in v4: * formatting(declare/assignment, line-breaks) according to comments * split "PATCH 3/3" into one patch per driver according to comments * depend upon patch [3] (macro ALIAS_SIZE) Changes in v3: * use UUID_STRING_LEN instead of self-defined * change loop condition in wmi_dev_match() according to comments * change the usage of snprintf return code in do_wmi_entry() Changes in v2: * add one Suggested-by and one Reviewed-by tag * depend upon patch [1] * reword commit message for [PATCH 2/3] and [PATCH 3/3] to document the reasoning behind the changes [1]: https://lkml.kernel.org/r/20190122200302.19861-1-2pi@xxxxxx [2]: https://lkml.kernel.org/r/20190126210634.GB13882@wrath [3]: https://lore.kernel.org/lkml/20190207123022.7961-1-2pi@xxxxxx/ Mattias Jacobsson (8): platform/x86: wmi: move struct wmi_device_id to mod_devicetable.h platform/x86: wmi: add WMI support to MODULE_DEVICE_TABLE() platform/x86: dell-smbios-wmi: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() platform/x86: dell-wmi-descriptor: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() platform/x86: dell-wmi: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() platform/x86: huawei-wmi: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() platform/x86: intel-wmi-thunderbolt: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() platform/x86: wmi-bmof: use MODULE_DEVICE_TABLE() instead of MODULE_ALIAS() drivers/platform/x86/dell-smbios-wmi.c | 2 +- drivers/platform/x86/dell-wmi-descriptor.c | 2 +- drivers/platform/x86/dell-wmi.c | 4 ++-- drivers/platform/x86/huawei-wmi.c | 3 +-- drivers/platform/x86/intel-wmi-thunderbolt.c | 2 +- drivers/platform/x86/wmi-bmof.c | 2 +- drivers/platform/x86/wmi.c | 2 +- include/linux/mod_devicetable.h | 12 ++++++++++ include/linux/wmi.h | 5 +---- scripts/mod/devicetable-offsets.c | 3 +++ scripts/mod/file2alias.c | 23 ++++++++++++++++++++ 11 files changed, 47 insertions(+), 13 deletions(-) -- 2.20.1
