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From:   Peng Fan <peng.fan@nxp.com>
To:     "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "will@kernel.org" <will@kernel.org>,
        "nsaenzjulienne@suse.de" <nsaenzjulienne@suse.de>
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        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        dl-linux-imx <linux-imx@nxp.com>
Subject: RE: [PATCH] arm64: mm: make CONFIG_ZONE_DMA configurable without
 EXPERT
Thread-Topic: [PATCH] arm64: mm: make CONFIG_ZONE_DMA configurable without
 EXPERT
Thread-Index: AQHV9tsrS4nkBuxsuEaY66LPIEgB5ahVd31w
Date:   Mon, 23 Mar 2020 01:30:53 +0000
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> Subject: [PATCH] arm64: mm: make CONFIG_ZONE_DMA configurable
> without EXPERT

Gentle ping..

Thanks,
Peng.

>=20
> From: Peng Fan <peng.fan@nxp.com>
>=20
> commit 1a8e1cef7603 ("arm64: use both ZONE_DMA and ZONE_DMA32")
> enables both ZONE_DMA and ZONE_DMA32. The lower 1GB memory will be
> occupied by ZONE_DMA, this will cause CMA allocation fail on some platfor=
ms,
> because CMA area could not across different type of memory zones.
>=20
> Make CONFIG_ZONE_DMA configurable without EXPERT option could let
> people build non debug kernel image with CONFIG_ZONE_DMA disabled.
>=20
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  arch/arm64/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>=20
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index
> 217e12ff2115..c4ba8bf011e1 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -270,7 +270,7 @@ config GENERIC_CALIBRATE_DELAY
>  	def_bool y
>=20
>  config ZONE_DMA
> -	bool "Support DMA zone" if EXPERT
> +	bool "Support DMA zone"
>  	default y
>=20
>  config ZONE_DMA32
> --
> 2.16.4