Re: [PATCH v2 08/10] libfdt: Introduce fdt_ptr_offset_

[Frank Li <Frank.li@nxp.com>]

On Thu, Apr 09, 2026 at 01:54:24PM +0200, Herve Codina wrote:
> libfdt provides internal helpers to convert an offset to a pointer but
> nothing to do the reverse operation.
>
> Introduce the fdt_ptr_offset_() internal helper to convert a pointer to
> an offset.
>
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  libfdt/libfdt_internal.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/libfdt/libfdt_internal.h b/libfdt/libfdt_internal.h
> index c1ae306..9fd0012 100644
> --- a/libfdt/libfdt_internal.h
> +++ b/libfdt/libfdt_internal.h
> @@ -47,6 +47,11 @@ static inline void *fdt_offset_ptr_w_(void *fdt, int offset)
>  	return (void *)(uintptr_t)fdt_offset_ptr_(fdt, offset);
>  }
>
> +static inline int fdt_ptr_offset_(const void *fdt, const void *ptr)
> +{
> +	return (const char *)ptr - (const char *)fdt_offset_ptr_(fdt, 0);
> +}
> +
>  static inline const struct fdt_reserve_entry *fdt_mem_rsv_(const void *fdt, int n)
>  {
>  	const struct fdt_reserve_entry *rsv_table =
> --
> 2.53.0
>