[PATCH 0/4] LD_DEAD_CODE_DATA_ELIMINATION fixes and enabling for powerpc

[Christophe LEROY]

Le 20/04/2018 à 09:34, Nicholas Piggin a écrit :
> A few people have been interested in this again. And I promised
> if it remains dead code it should be removed, so I would like to
> have another try.
> 
> I think I got snagged on the modules problem last time and did
> not take the time to work it out, this time I just turned off the
> compile options for modules (the linker option was never set anyway
> so no loss).
> 
> This includes some linker script catches and ideas from others, I
> didn't documnt them all, but thanks for looking.

Thanks a lot.

It works well on both my 8xx and 83xx targets. I don't have 
CONFIG_MODULE set.

Christophe

> 
> I would be interested to help other archs get this working too, if
> anybody needs some help.
> 
> Thanks,
> Nick
> 
> Nicholas Piggin (4):
>    kbuild: Fix asm-generic/vmlinux.lds.h for
>      LD_DEAD_CODE_DATA_ELIMINATION
>    kbuild: LD_DEAD_CODE_DATA_ELIMINATION no
>      -ffunction-sections/-fdata-sections for module build
>    kbuild: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selectable if
>      enabled
>    powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected
> 
>   Makefile                          |  4 +--
>   arch/Kconfig                      | 15 ----------
>   arch/powerpc/Kconfig              |  1 +
>   arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++-------
>   include/asm-generic/vmlinux.lds.h | 49 ++++++++++++++++++-------------
>   init/Kconfig                      | 27 +++++++++++++++++
>   6 files changed, 70 insertions(+), 48 deletions(-)
>