On Wed, Dec 05, 2018 at 02:40:06PM +0000, Robin Murphy wrote: > 32-bit Arm doesn't have ZONE_DMA32, but has (or at least had at the time) a > 2GB ZONE_DMA. Whether we actually need that or not depends on how this all > interacts with LPAE and highmem, but I'm not sure of those details off-hand. Well, arm32 can't address more than 32-bits in the linear kernel mapping, so GFP_KERNEL should be perfectly fine there if the limit really is 32-bits and not 31 or smaller because someone stole a bit or two somewhere.
