Messages in this thread | | | Date | Mon, 13 Jan 2020 23:11:58 +0800 | Subject | Re: [PATCH 1/2] MIPS: Define pgprot_dmacoherent according to coherentio status | From | Jiaxun Yang <> |
| |
于 2020年1月13日 GMT+08:00 下午10:58:20, Christoph Hellwig <hch@lst.de> 写到: >On Mon, Jan 13, 2020 at 10:07:04PM +0800, Jiaxun Yang wrote: >> For MIPS chips that support coherentio DMA, it's always safe >> to make DMA requests cached. > >For DMA coherent devices pgprot_dmacoherent isn't even used, so this >doesn't make sense.
Hi,
I'm supposed to use it later in drm/ttm ttm_bo_util to overwrite pgprot for TTM_PL_SYSTEM. And I wish this pgropt can always represent dmacoherent pgropt. Would it be fine?
Thanks
-- Jiaxun Yang
| |