Re: [PATCH] usb: gadget: multi: Mark {cdc,rndis}_config_register() __init

[Michal Nazarewicz]

On Wed, Apr 24 2013, Geert Uytterhoeven wrote:
> If gcc (e.g. 4.1.2) decides not to inline cdc_config_register() and
> rndis_config_register(), this will cause section mismatch warnings:
>
> WARNING: drivers/usb/gadget/g_multi.o(.text+0x32f6): Section mismatch in reference from the function cdc_config_register() to the function .init.text:cdc_do_config()
> The function cdc_config_register() references
> the function __init cdc_do_config().
> This is often because cdc_config_register lacks a __init
> annotation or the annotation of cdc_do_config is wrong.
>
> WARNING: drivers/usb/gadget/g_multi.o(.text+0x3326): Section mismatch in reference from the function rndis_config_register() to the function .init.text:rndis_do_config()
> The function rndis_config_register() references
> the function __init rndis_do_config().
> This is often because rndis_config_register lacks a __init
> annotation or the annotation of rndis_do_config is wrong.
>
> Fortunately they're harmless, as {cdc,rndis}_config_register() are only
> called from multi_bind(), which is annotated with __ref.
>
> Mark {cdc,rndis}_config_register() with the __init annotation to kill the
> warning.
>
> Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>

Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>

With transition to configfs all those __inits and __refs will probably
go away in the long term though.

> ---
> Note: I did not verify that multi_bind() is rightfully marked __ref.

It should be.  It's only referenced in multi_driver object as a bind
callback which is called by composite_bind() which is referenced in
composite_driver_template as bind callback which is called by
usb_gadget_probe_driver() which is called by usb_composite_probe() which
is called by multi_init() which is __init and called as module_init.

-- 
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.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  MichaÅ âmina86â Nazarewicz    (o o)
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