linux-kernel - [PATCH] arm64: mm: make CONFIG_ZONE

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Message-Id: <1583844526-24229-1-git-send-email-peng.fan@nxp.com>
Date:   Tue, 10 Mar 2020 20:48:46 +0800
From:   peng.fan@....com
To:     catalin.marinas@....com, will@...nel.org, nsaenzjulienne@...e.de
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, Peng Fan <peng.fan@....com>
Subject: [PATCH] arm64: mm: make CONFIG_ZONE_DMA configurable without EXPERT

From: Peng Fan <peng.fan@....com>

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 platforms, because CMA area could not across
different type of memory zones.

Make CONFIG_ZONE_DMA configurable without EXPERT option
could let people build non debug kernel image with
CONFIG_ZONE_DMA disabled.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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

 config ZONE_DMA
-	bool "Support DMA zone" if EXPERT
+	bool "Support DMA zone"
 	default y

 config ZONE_DMA32
-- 
2.16.4