Messages in this thread | | | Date | Sun, 16 Jun 2013 10:10:05 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [RFC] arm: Remove sa1111 special case from mm setup code |
| |
On Sun, Jun 16, 2013 at 12:15:08AM +0100, Grant Likely wrote: > I don't think this special case is needed anymore. From what I can tell, > setup_dma_zone() takes care of marking the region to be reserved for > DMA, and that happens before arm_memblock_init() which calls > arm_mm_memblock_reserve(). Therefore the mm setup should already know > about the reserved region and it won't need to be explicitly reserved > and then freed. That means the special case can be dropped from the > common code.
No it doesn't. setup_dma_zone is all about setting the high watermark for GFP_DMA allocations. It has nothing to do with _temoprarily_ reserving the low 1MB, ensuring that no other user can use any of that precious SA1111 memory during the kernel boot.
| |