Re: [PATCH v2 09/11] dma-direct: turn ARCH_ZONE_DMA_BITS into a variable

Michael Ellerman
2019-08-26T11:33:59Z

Nicolas Saenz Julienne <nsaenzjulienne@suse.de> writes:
> diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
> index 0d52f57fca04..73668a21ae78 100644
> --- a/arch/powerpc/include/asm/page.h
> +++ b/arch/powerpc/include/asm/page.h
> @@ -319,13 +319,4 @@ struct vm_area_struct;
> #endif /* __ASSEMBLY__ */
> #include <asm/slice.h>
>
> -/*
> - * Allow 30-bit DMA for very limited Broadcom wifi chips on many powerbooks.

This comment got lost.

> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index 9191a66b3bc5..2a69f87585df 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -237,9 +238,14 @@ void __init paging_init(void)
> printk(KERN_DEBUG "Memory hole size: %ldMB\n",
> (long int)((top_of_ram - total_ram) >> 20));
>
> + if (IS_ENABLED(CONFIG_PPC32))

Can you please propagate it here?

> + zone_dma_bits = 30;
> + else
> + zone_dma_bits = 31;
> +

cheers