On Thu, Oct 31, 2019 at 04:53:13PM +0100, Nicolas Saenz Julienne wrote: > > > +#define ARM64_ZONE_DMA_BITS 30 > > > + > > > /* > > > * We need to be able to catch inadvertent references to memstart_addr > > > * that occur (potentially in generic code) before arm64_memblock_init() > > > @@ -424,6 +427,8 @@ void __init arm64_memblock_init(void) > > > else > > > arm64_dma_phys_limit = PHYS_MASK + 1; > > > > > > + zone_dma_bits = ARM64_ZONE_DMA_BITS; > > > + > > > reserve_crashkernel(); > > > > This actually adds a new limit, as there wasn't one before for arm64. > > Well, as zone_dma_bits is only relevant in dma/direct when ZONE_DMA is defined > I figured it doesn't matter if the variable is set conditionally to ZONE_DMA > or > not.
I'd much prefer that to do separately.
