On Monday 29 July 2013 07:15 AM, Russell King - ARM Linux wrote: > 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. > Done. 7794/1, 7795/1, 7796/1, 7797/1, 7798/1, 7799/1 Didn't know how to get XXXX/1,2,3,4... pushed into the tracker. BTW, I have also pushed the patched on my git tree branch [1] just in case you or some one needs it. Regards, Santosh [1] git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone.git 3.12/nobootmem_n_dma-mask -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
