On Fri, Jul 26, 2013 at 12:28:26PM -0400, Santosh Shilimkar wrote: > On Friday 26 July 2013 11:10 AM, Russell King - ARM Linux wrote: > > On Fri, Jul 12, 2013 at 05:48:09PM -0400, Santosh Shilimkar wrote: > >> The series is an attempt to move ARM port to NO_BOOTMEM. As discussed > >> on list NO_BOOTMEM move needed updates to max*pfn meaning to be maximum > >> PFNs but that breaks the dma_mask for few block layer drivers since > >> ARM start of physical memory is not PFN0 unlike most of the architectures. > >> Some more read on it is here: > >> http://lwn.net/Articles/543408/ > >> http://lwn.net/Articles/543424/ > >> > >> To address this issue, we introduce generic dma_max_pfn() helper which > >> can be overridden from the architectures. > >> > >> Another intention behind move to nobootmem is also to convert ARM to > >> switch to memblock and getting rid of bootmem allocator dependency which > >> don't work for LPAE machines which has physical memory starting beyond > >> 4 GB boundary. It needs changes to core kernel and also a new memblock > >> API. More on this can be found here: > >> https://lkml.org/lkml/2013/6/29/77 > >> > >> I have been trying to cook up these patches with kind help from Russell > >> and we know series don't solve all the dma_mask bad assumptions. But at > >> least I am hoping that it can get the ball rolling. > >> > >> Comments/testing help is welcome !! > > > > As this is related to some of the cleanup of dma_mask which I've been > > doing, I think it may make sense to roll this into one tree. Any > > objection to that? > > > > Can we get any acks on this stuff from Jens and Jejb etc - especially > > for the bits which touch block/ and for the scsi bits as these are > > touching other subsystems. (oddly, linux-scsi wasn't on the original > > mail for this series summary.) > > > Sorry I missed the scsi lists on the summary patch. > > While browsing the code I found another spot in mmc layer which > needs fixing. The patch is at the end of the email with Chris > and linux-mmc cc'ed here. Would you mind putting them all in the patch system, I can add the acks should anyone supply them later, and I'll repost them along with my set of dma-mask patches. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
