Messages in this thread | | | Date | Wed, 20 Jun 2018 23:40:43 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH 1/5] RISC-V: Add conditional macro for zone of DMA32 |
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On Thu, Jun 21, 2018 at 09:41:41AM +0800, Zong Li wrote: > The DMA32 is for 64-bit usage. > > Signed-off-by: Zong Li <zong@andestech.com> > --- > 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
This breaks the 64-bit setup. The second line needs to be kept for the CONFIG_ZONE_DMA32 case.
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