[PATCH] Remove all references to unknown Kconfig symbols

[Josh Boyer]

On Thu, Oct 2, 2014 at 5:00 AM, Paul Bolle <pebolle at tiscali.nl> wrote:
> Reported-by: Paul Bolle <pebolle at tiscali.nl>
> ---
> 0) I do not have fedpkg installed so "make prep" failed. Neither did I
> test this any other way. As a consequence this is not Signed-off-by, but
> only Reported-by. I think that testing that nothing breaks is the real
> work here. I do hope it turns out not to be too much work.

Nope, worked fine and no differences showed in the resulting configs.

> 1) I stumbled on kernel-arm64.patch. That was fun! Anyhow, if one
> applies this patch and runs the perl script I just sent, one should see:
>     config-arm64:111: No Kconfig symbol matches 'CONFIG_PCI_XGENE'
>     config-arm64:120: No Kconfig symbol matches 'CONFIG_SBSAUART_TTY'
>     config-generic:5205: No Kconfig symbol matches 'CONFIG_SBSAUART_TTY'
>
> unless one is building for arm64.

Yeah, that one is special.

> 2) Please note that this also takes into account Kconfig symbols added
> by patches currently in master. References to their macros were not
> removed!

Excellent work!  I've applied it locally and it should be pushed later
today.  One question below.


> diff --git a/config-arm-generic b/config-arm-generic
> index 9ddb1f0ccec8..1f07efa9b2fc 100644
> --- a/config-arm-generic
> +++ b/config-arm-generic
> @@ -79,15 +79,12 @@ CONFIG_GENERIC_CPUFREQ_CPU0=m
>  # Device tree
>  CONFIG_DTC=y
>  CONFIG_DMA_OF=y
> -CONFIG_PROC_DEVICETREE=y

I remember this change happening upstream, but there are quite a few
defconfig files that still have this included.  They also include some
of the other symbols you've identified, like CONFIG_MTD_CHAR.  Have
you sent patches upstream to remove these symbols from the arch
defconfigs as well?

josh