On Mon, Jan 09, 2023 at 07:18:27AM +0000, Christophe Leroy wrote: > > Doesn't GFP_DMA guarantees that the provided memory is addressable for > DMA ? Or do we assume that all memory returned by kmalloc can be used > for DMA ? No it does not. Please refer to the DMI API documentation. > kmalloc() already returns not DMA aligned memory, why does it becomes a > problem now ? As it stands kmalloc on arm64 returns DMA-aligned memory. This will soon no longer be the case. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
