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Subject[PATCH] arm64: mm: make CONFIG_ZONE_DMA configurable without EXPERT
From: Peng Fan <>

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

Signed-off-by: Peng Fan <>
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
 \ /
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