On Tue, 2023-02-21 at 22:49 +0100, Pali Rohár wrote:

On Tuesday 21 February 2023 16:29:32 Paul Gortmaker wrote:

quoted

[Re: [PATCH 4/4] powerpc: remove orphaned MPC85xx kernel config
fragments.] On 21/02/2023 (Tue 21:03) Pali Roh??r wrote:

quoted

On Tuesday 21 February 2023 14:46:37 Paul Gortmaker wrote:

quoted

None of these have a reference anymore anywhere, such as like this:

  arch/powerpc/Makefile:  $(call
merge_into_defconfig,mpc85xx_base.config,\

As such, we probably should just clean up and remove them.

Cc: Scott Wood <oss@buserror.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <redacted>
Signed-off-by: Paul Gortmaker <redacted>
---
 arch/powerpc/configs/85xx-32bit.config |   5 -
 arch/powerpc/configs/85xx-hw.config    | 139 ------------------------
-
 arch/powerpc/configs/85xx-smp.config   |   2 -
 3 files changed, 146 deletions(-)
 delete mode 100644 arch/powerpc/configs/85xx-32bit.config
 delete mode 100644 arch/powerpc/configs/85xx-hw.config
 delete mode 100644 arch/powerpc/configs/85xx-smp.config

This change is likely going to break mpc85xx platform because defconfig
files includes all these files which you are going to remove. For
example in arch/powerpc/Makefile is:

PHONY += mpc85xx_smp_defconfig
mpc85xx_smp_defconfig:
        $(call merge_into_defconfig,mpc85xx_base.config,\
                85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)

OK, it seems you've answered a question for me.  That being "why didn't
grep find a reference to these fragments?"

It seems the ".config" extension is optional?

I really do not know. (And I'm not sure if I want to know answer :D)

It's not optional; you have to leave it off:

# Used to create 'merged defconfigs'
# To use it $(call) it with the first argument as the base defconfig
# and the second argument as a space separated list of .config files to merge,
# without the .config suffix.
define merge_into_defconfig
...

quoted

This seems inconsistent at best, to reference some files with the
.config extension and others without it.  Not blaming you for that,
but it is probably something that needs looking into.

I agree it is inconsistent. But it was there before I looked or touched
any powerpc code. So it looks like something which nobody wanted to
cleanup because "it works" and had no motivation.

No, it's intentional to reduce verbosity.  If by "inconsistent" you're
referring to mpc85xx_base.config, that argument sometimes refers to _defconfig
files (i.e. the pseries targets which were the initial user of
merge_into_config) so that argument can't autoappend .config.

-Crystal