Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [Linaro-mm-sig] [RFC] ARM DMA mapping TODO, v1 | Date | Fri, 29 Apr 2011 13:21:16 +0200 |
| |
On Friday 29 April 2011, Benjamin Herrenschmidt wrote: > > > However, dma_alloc_coherent() memory can't be used with the dma_sync_* > > API as its return address (unlike other architectures) is not in the > > kernel direct mapped memory range. > > Well, on non-coherent architectures, dma_sync_* are cache flushes, I > don't see the point of doing those on a non-cachable mapping anyways. > The point was that you cannot do
#define dma_alloc_coherent dma_alloc_noncoherent
on ARM, as some other architectures do.
Arnd
| |