Re: [PATCH] ARM: orion: fix orion_ge00_switch_board_info initialization

[Andrew Lunn]

On Wed, Feb 21, 2018 at 01:18:49PM +0100, Arnd Bergmann wrote:
> A section type mismatch warning shows up when building with LTO,
> since orion_ge00_mvmdio_bus_name was put in __initconst but not marked
> const itself:
> 
> include/linux/of.h: In function 'spear_setup_of_timer':
> arch/arm/mach-spear/time.c:207:34: error: 'timer_of_match' causes a section type conflict with 'orion_ge00_mvmdio_bus_name'
>  static const struct of_device_id timer_of_match[] __initconst = {
>                                   ^
> arch/arm/plat-orion/common.c:475:32: note: 'orion_ge00_mvmdio_bus_name' was declared here
>  static __initconst const char *orion_ge00_mvmdio_bus_name = "orion-mii";
>                                 ^
> 
> As pointed out by Andrew Lunn, it should in fact be 'const' but not
> '__initconst' because the string is never copied but may be accessed
> after the init sections are freed. To fix that, I get rid of the
> extra symbol and rewrite the initialization in a simpler way that
> assigns both the bus_id and modalias statically.
> 
> I spotted another theoretical bug in the same place, where d->netdev[i]
> may be an out of bounds access, this can be fixed by moving the device
> assignment into the loop.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew