On Tue, 27 Mar 2018, Christoph Hellwig wrote: > On Tue, Mar 27, 2018 at 10:12:54AM +0200, Sebastian Ott wrote: > > Hi, > > > > commit 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 broke usage of dma > > allocations specifying __GFP_ZERO by silently removing that flag. > > > > Why should "the memory returned [] always be zeroed."? > > Because that is what the current implementations do - we always zero > the memory returned from dma_map_ops.alloc().
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. Sebastian
