[RFC][PATCH] add dma_reserve_coherent_memory()/dma_free_reserved_memory() API
From: Guennadi Liakhovetski <hidden>
Date: 2010-08-26 09:45:57
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On Thu, 26 Aug 2010, FUJITA Tomonori wrote:
Why can't you revert a commit that causes the regression?
See this reply, and the complete thread too. http://marc.info/?l=linux-sh&m=128130485208262&w=2
The related DMA API wasn't changed in 2.6.36-rc1. The DMA API is not responsible for the regression. And the patchset even exnteds the definition of the DMA API (dma_declare_coherent_memory). Such change shouldn't applied after rc1. I think that DMA-API.txt says that dma_declare_coherent_memory() handles coherent memory for a particular device. It's not for the API that reserves coherent memory that can be used for any device for a single device.
Anyway, we need a way to fix the regression. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/