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    Subject[PATCH v2 1/4] RISC-V: Add conditional macro for zone of DMA32
    Date
    The DMA32 is for 64-bit usage.

    Signed-off-by: Zong Li <zong@andestech.com>
    ---
    arch/riscv/mm/init.c | 2 ++
    1 file changed, 2 insertions(+)

    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);
    --
    2.16.1
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