[U-Boot] [BUG] include/net.h: warning: 'eth_is_on_demand_init' defined but not used

[Joe Hershberger]

Hi Heinrich,

On Fri, Aug 30, 2019 at 12:21 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> Hello Joe,
>
> compiling U-Boot creates dozens of warnings for include/net.h:
>
>    CC      arch/arm/lib/asm-offsets.s
> In file included from include/common.h:342,
>                   from lib/asm-offsets.c:14:
> include/net.h:689:28: warning: always_inline function might not be
> inlinable [-Wattributes]
>    689 | static __always_inline int eth_is_on_demand_init(void)
>        |                            ^~~~~~~~~~~~~~~~~~~~~
> include/net.h:689:28: warning: 'eth_is_on_demand_init' defined but not
> used [-Wunused-function]
>    HOSTCC  scripts/dtc/srcpos.o
> In file included from include/common.h:342,
>                   from arch/arm/lib/asm-offsets.c:14:
> include/net.h:689:28: warning: always_inline function might not be
> inlinable [-Wattributes]
>    689 | static __always_inline int eth_is_on_demand_init(void)
>        |                            ^~~~~~~~~~~~~~~~~~~~~
> include/net.h:689:28: warning: 'eth_is_on_demand_init' defined but not
> used [-Wunused-function]
>
> Software used for building U-Boot:
>
> U-Boot HEAD, rpi_3_b_plus_defconfig
> gcc (FreeBSD Ports Collection) 9.1.0
> FreeBSD generic 13.0-CURRENT FreeBSD 13.0-CURRENT r351591 GENERIC  arm64
>
> Why should we create this function in every file that by chance includes
> net.h?
>
> The function is only used in drivers/net/netconsole.c and net/net.c.
>
> One solution would be to create a dedicated include that is only
> referenced in these two files.

We could, but it might also be reasonable to allow the compiler the
prerogative to inline it or not and just define it as a regular
function that can be stripped by the linker. Thoughts?

-Joe