From: Zong Li <zong@andestech.com>
Date: Mon, 25 Jun 2018 08:49:37 +0000 (+0800)
Subject: RISC-V: Add conditional macro for zone of DMA32
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=d5fad48cfb4b183d87960904c177eeeb9412b929;p=openwrt%2Fstaging%2Fblogic.git

RISC-V: Add conditional macro for zone of DMA32

The DMA32 is for 64-bit usage.

Signed-off-by: Zong Li <zong@andestech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
---

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index c77df8142be2..58a522f9bcc3 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -28,7 +28,9 @@ 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));
+#endif
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
 	free_area_init_nodes(max_zone_pfns);