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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>
This commit is contained in:
Zong Li 2018-06-25 16:49:37 +08:00 committed by Palmer Dabbelt
parent 021c91791a
commit d5fad48cfb
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1 changed files with 2 additions and 0 deletions
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arch/riscv/mm/init.c
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@ -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);