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authorChristoph Hellwig <hch@lst.de>2018-04-27 08:41:09 +0200
committerChristoph Hellwig <hch@lst.de>2018-05-19 08:46:22 +0200
commitf1306f0423ec02a1da31bab34006323fcadf2e06 (patch)
tree6edcc2311f1b7ef8912fdd3fc60d9a7be02ff84d /arch/riscv
parentc3e4ed012ba79cc61513cc81af53c94e7af7db81 (diff)
downloadlinux-f1306f0423ec02a1da31bab34006323fcadf2e06.tar.bz2
riscv: only enable ZONE_DMA32 for 64-bit
Until we actually support > 32bit physical addresses for 32-bit using highmem there is no point in enabling ZONE_DMA32. And even if such support is ever added it probably should be conditional to not burden low end embedded devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 7817bbe0cfac..c4488ce8c2fa 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -48,7 +48,7 @@ config MMU
config ZONE_DMA32
bool
- default y
+ default y if 64BIT
config PAGE_OFFSET
hex