[PATCH 1/5] RISC-V: Add conditional macro for zone of DMA32
From: Zong Li
Date: Wed Jun 20 2018 - 21:48:11 EST
The DMA32 is for 64-bit usage.
Signed-off-by: Zong Li <zong@xxxxxxxxxxxxx>
---
arch/riscv/mm/init.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index c77df8142be2..91a5852e28fd 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -28,8 +28,11 @@ static void __init zone_sizes_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
+#ifdef CONFIG_ZONE_DMA32
max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
+#else
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+#endif
free_area_init_nodes(max_zone_pfns);
}
--
2.16.1