Linux kernel wl18xx module_init is it generated?


Linux kernel wl18xx module_init is it generated?



I'm looking at this drivers/net/wireless/ti/wl18xx driver module.


drivers/net/wireless/ti/wl18xx



The traditional module_init() is not in the source code. Yet the trace dump shows a wl18xx_driver_init() is called, though that function again is not in the source code.


module_init()


wl18xx_driver_init()



I can see the wl18xx_driver_init() in the objdump of main.o in that driver directory.


wl18xx_driver_init()


main.o



Is it that in late versions of kernels those functions/macros are automatically generated? How is that done?




1 Answer
1



wl18xx_driver_init is generated here with the expansion of module_platform_driver(wl18xx_driver) macro.
It expands roughly to smth like:


wl18xx_driver_init


module_platform_driver(wl18xx_driver)


static int __init wl18xx_driver_init(void) {
return platform_driver_register(&(wl18xx_driver));
}
static initcall_t __initcall_wl18xx_driver_init6 __used __attribute__((__section__(".initcall" "6" ".init"))) = wl18xx_driver_init;
static void __exit wl18xx_driver_exit(void) {
platform_driver_unregister(&(wl18xx_driver));
}
static exitcall_t __exitcall_wl18xx_driver_exit __exit_call = wl18xx_driver_exit;



See module_platform_driver macro and module driver macro.



@ It would be best to post some source code or links the next time, it would make it easier. Including kernel version would be also a good idea.






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