> 2023年2月21日 17:58，Christoph Hellwig <hch@xxxxxx> 写道： > > On Tue, Feb 21, 2023 at 12:46:11PM +0000, Jiaxun Yang wrote: >> Provide a kconfig option to allow arches to manipulate default >> value of dma_default_coherent in Kconfig. > > I don't see the win over just doing this by setting dma_default_coherent > in the early boot code. I just don’t want to dig into every archs’ early boot code to decide a good timing for setting this variable. Also as we do have a OF_DMA_DEFAULT_COHERENT before it makes more sense to me. Thanks - Jiaxun
