On Thu, Jul 12, 2018 at 11:48:47AM +0900, Joonsoo Kim wrote: > One of existing user is general DMA layer and it takes gfp flags that is > provided by user. I don't check all the DMA allocation sites but how do > you convince that none of them try to use anything other > than GFP_KERNEL [|__GFP_NOWARN]?
They use a few others things still like __GFP_COMP, __GPF_DMA or GFP_HUGEPAGE. But all these are bogus as we have various implementations that can't respect them. I plan to get rid of the gfp_t argument in the dma_map_ops alloc method in a few merge windows because of that, but it needs further implementation consolidation first.
