[0/3] of/fdt: Rework early FDT scanning functions

Message

Rob Herring (Arm) Nov. 18, 2021, 6:12 p.m. UTC

The early FDT scanning functions use of_scan_flat_dt() which implements 
its own node walking method. This function predates libfdt and is an 
unnecessary indirection. This series reworks 
early_init_dt_scan_chosen(), early_init_dt_scan_root(), and 
early_init_dt_scan_memory() to be called directly and use libfdt calls.

Ultimately, I want to remove of_scan_flat_dt(). Most of the remaining 
of_scan_flat_dt() users are in powerpc.

Rob


Rob Herring (3):
  of/fdt: Rework early_init_dt_scan_chosen() to call directly
  of/fdt: Rework early_init_dt_scan_root() to call directly
  of/fdt: Rework early_init_dt_scan_memory() to call directly

 arch/mips/ralink/of.c                |  16 +---
 arch/powerpc/kernel/prom.c           |  22 ++---
 arch/powerpc/mm/nohash/kaslr_booke.c |   4 +-
 drivers/of/fdt.c                     | 121 ++++++++++++++-------------
 include/linux/of_fdt.h               |   9 +-
 5 files changed, 79 insertions(+), 93 deletions(-)

Comments

Frank Rowand Nov. 24, 2021, 5:01 p.m. UTC | #1

On 11/18/21 1:12 PM, Rob Herring wrote:
> The early FDT scanning functions use of_scan_flat_dt() which implements 
> its own node walking method. This function predates libfdt and is an 
> unnecessary indirection. This series reworks 
> early_init_dt_scan_chosen(), early_init_dt_scan_root(), and 
> early_init_dt_scan_memory() to be called directly and use libfdt calls.
> 
> Ultimately, I want to remove of_scan_flat_dt(). Most of the remaining 
> of_scan_flat_dt() users are in powerpc.
> 
> Rob
> 
> 
> Rob Herring (3):
>   of/fdt: Rework early_init_dt_scan_chosen() to call directly
>   of/fdt: Rework early_init_dt_scan_root() to call directly
>   of/fdt: Rework early_init_dt_scan_memory() to call directly
> 
>  arch/mips/ralink/of.c                |  16 +---
>  arch/powerpc/kernel/prom.c           |  22 ++---
>  arch/powerpc/mm/nohash/kaslr_booke.c |   4 +-
>  drivers/of/fdt.c                     | 121 ++++++++++++++-------------
>  include/linux/of_fdt.h               |   9 +-
>  5 files changed, 79 insertions(+), 93 deletions(-)
> 


"checkpatch --strict" reports some "CHECK" issues, but review of the patches
for correctness becomes much more difficult if they are addressed, so they
should be ignored for this series.

-Frank