[PATCH 09/12] platform/early: add an init section for early driver data

[Bartosz Golaszewski]

2018-05-14 23:29 GMT+02:00 Geert Uytterhoeven <geert at linux-m68k.org>:
> Hi Bartosz,
>
> On Fri, May 11, 2018 at 6:20 PM, Bartosz Golaszewski <brgl at bgdev.pl> wrote:
>> From: Bartosz Golaszewski <bgolaszewski at baylibre.com>
>>
>> Provide a separate section in which pointers to early platform driver
>> structs will be stored.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski at baylibre.com>
>
> Thanks for your patch!
>
>> --- a/include/asm-generic/vmlinux.lds.h
>> +++ b/include/asm-generic/vmlinux.lds.h
>> @@ -214,6 +214,16 @@
>>  #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
>>  #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
>>
>> +#ifdef CONFIG_EARLY_PLATFORM
>> +#define EARLY_PLATFORM_DRIVERS_TABLE()                                 \
>> +       . = ALIGN(8);                                                   \
>
> Should this use STRUCT_ALIGN() instead?
>

No, we're only using it to store pointers to structs, not the actual
struct early_platform_driver objects.

>> +       VMLINUX_SYMBOL(__early_platform_drivers_table) = .;             \
>> +       KEEP(*(__early_platform_drivers_table))                         \
>> +       VMLINUX_SYMBOL(__early_platform_drivers_table_end) = .;
>> +#else
>> +#define EARLY_PLATFORM_DRIVERS_TABLE()
>> +#endif
>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

Thanks,
Bartosz