Re: [PATCH v2 00/15] init_mm: cleanup ARCH's text/data/brk setup code

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On 2021/6/7 5:29, Mike Rapoport wrote:
Hello Kefeng,

On Fri, Jun 04, 2021 at 03:06:18PM +0800, Kefeng Wang wrote:
Add setup_initial_init_mm() helper, then use it
to cleanup the text, data and brk setup code.

v2:
- change argument from "char *" to "void *" setup_initial_init_mm()
   suggested by Geert Uytterhoeven
- use NULL instead of (void *)0 on h8300 and m68k
- collect ACKs

Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-csky@xxxxxxxxxxxxxxx
Cc: uclinux-h8-devel@xxxxxxxxxxxxxxxxxxxx
Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx
Cc: openrisc@xxxxxxxxxxxxxxxxxxxx
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: linux-riscv@xxxxxxxxxxxxxxxxxxx
Cc: linux-sh@xxxxxxxxxxxxxxx
Cc: linux-s390@xxxxxxxxxxxxxxx
Kefeng Wang (15):
   mm: add setup_initial_init_mm() helper
   arc: convert to setup_initial_init_mm()
   arm: convert to setup_initial_init_mm()
   arm64: convert to setup_initial_init_mm()
   csky: convert to setup_initial_init_mm()
   h8300: convert to setup_initial_init_mm()
   m68k: convert to setup_initial_init_mm()
   nds32: convert to setup_initial_init_mm()
   nios2: convert to setup_initial_init_mm()
   openrisc: convert to setup_initial_init_mm()
   powerpc: convert to setup_initial_init_mm()
   riscv: convert to setup_initial_init_mm()
   s390: convert to setup_initial_init_mm()
   sh: convert to setup_initial_init_mm()
   x86: convert to setup_initial_init_mm()
I might be missing something, but AFAIU the init_mm.start_code and other
fields are not used really early so the new setup_initial_init_mm()
function can be called in the generic code outside setup_arch(), e.g in
mm_init().

Hi Mike, each architecture has their own value, not the same, eg m68K and

h8300, also the name of the text/code/brk is different in some arch, so I keep

unchanged.

  arch/arc/mm/init.c                 | 5 +----
  arch/arm/kernel/setup.c            | 5 +----
  arch/arm64/kernel/setup.c          | 5 +----
  arch/csky/kernel/setup.c           | 5 +----
  arch/h8300/kernel/setup.c          | 5 +----
  arch/m68k/kernel/setup_mm.c        | 5 +----
  arch/m68k/kernel/setup_no.c        | 5 +----
  arch/nds32/kernel/setup.c          | 5 +----
  arch/nios2/kernel/setup.c          | 5 +----
  arch/openrisc/kernel/setup.c       | 5 +----
  arch/powerpc/kernel/setup-common.c | 5 +----
  arch/riscv/kernel/setup.c          | 5 +----
  arch/s390/kernel/setup.c           | 5 +----
  arch/sh/kernel/setup.c             | 5 +----
  arch/x86/kernel/setup.c            | 5 +----
  include/linux/mm_types.h           | 8 ++++++++
  16 files changed, 23 insertions(+), 60 deletions(-)

--
2.26.2


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