how to disable the button kernel module?

how to disable the button kernel module?

[Bruno GNUser]

I realize that /button/ is a kernel built-in and therefore cannot be disabled
via the /blacklist=<module_name>/ boot parameter. So I thought I'd try
/initcall_blacklist=<function>/ but I cannot find an obvious module
initialization function in button.c

Please, how would one disable the /button/ module? Either using the
/initcall_blacklist=foo/ or some other method is fine, as long as it does
not involve recompiling the kernel. 

Thanks,
Bruno GNUser



--
Sent from: http://linux-kernel.2935.n7.nabble.com/

Re: how to disable the button kernel module?

[Randy Dunlap]

On 11/14/19 4:00 AM, Bruno GNUser wrote:
> I realize that /button/ is a kernel built-in and therefore cannot be disabled
> via the /blacklist=<module_name>/ boot parameter. So I thought I'd try
> /initcall_blacklist=<function>/ but I cannot find an obvious module
> initialization function in button.c

In what kernel version if the button driver built-in?
It currently can be built as a loadable module.

The lines
module_driver(acpi_button_driver, acpi_button_register_driver,
	       acpi_button_unregister_driver);
at the end of the source file create an init function named
acpi_button_driver_init.  You could try:
  initcall_blacklist=acpi_button_driver_init


> Please, how would one disable the /button/ module? Either using the
> /initcall_blacklist=foo/ or some other method is fine, as long as it does
> not involve recompiling the kernel. 

Any help from ACPI people?


> Thanks,
> Bruno GNUser
> 
> 
> --
> Sent from: http://linux-kernel.2935.n7.nabble.com/


-- 
~Randy

Re: how to disable the button kernel module?

[Rafael J. Wysocki]

On Fri, Nov 15, 2019 at 6:33 AM Randy Dunlap <rdunlap@infradead.org> wrote:
>
> On 11/14/19 4:00 AM, Bruno GNUser wrote:
> > I realize that /button/ is a kernel built-in and therefore cannot be disabled
> > via the /blacklist=<module_name>/ boot parameter. So I thought I'd try
> > /initcall_blacklist=<function>/ but I cannot find an obvious module
> > initialization function in button.c
>
> In what kernel version if the button driver built-in?
> It currently can be built as a loadable module.
>
> The lines
> module_driver(acpi_button_driver, acpi_button_register_driver,
>                acpi_button_unregister_driver);
> at the end of the source file create an init function named
> acpi_button_driver_init.  You could try:
>   initcall_blacklist=acpi_button_driver_init
>
>
> > Please, how would one disable the /button/ module? Either using the
> > /initcall_blacklist=foo/ or some other method is fine, as long as it does
> > not involve recompiling the kernel.
>
> Any help from ACPI people?

https://lore.kernel.org/linux-acpi/CAJZ5v0hy2QpJtnGVvOOggOzTDifD1HYosN9vf0y_=15b+M8v0Q@mail.gmail.com/T/#t

Thanks!