lkml.org 
[lkml]   [2013]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [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.


\
 
 \ /
  Last update: 2013-06-16 12:01    [W:0.063 / U:2.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site