On Tue, 27 Mar 2018, Christoph Hellwig wrote: > On Tue, Mar 27, 2018 at 05:24:10PM +0200, Sebastian Ott wrote: > > What do you mean by current implementations? Arch specific code? At least > > on s390 we don't do that. dma-mapping.h doesn't do it either. > > The arch implementations should do it. Seems like s390 and potentially > a few others don't. I'm a little slow due to a cast on one arm, but I'll > do an audit and will fix up anything I'll find.
What was wrong with the old behavior (let the caller decide - the same as with memory allocations)? We have interfaces like dma_zalloc_coherent, which explicitely set __GFP_ZERO. We have callers of dma_alloc followed by a manually memset.. Sebastian
