Files
ack-tegra/include/linux
Bjorn Helgaas e7f8567db9 resources: support allocating space within a region from the top down
Allocate space from the top of a region first, then work downward,
if an architecture desires this.

When we allocate space from a resource, we look for gaps between children
of the resource.  Previously, we always looked at gaps from the bottom up.
For example, given this:

    [mem 0xbff00000-0xf7ffffff] PCI Bus 0000:00
      [mem 0xbff00000-0xbfffffff] gap -- available
      [mem 0xc0000000-0xdfffffff] PCI Bus 0000:02
      [mem 0xe0000000-0xf7ffffff] gap -- available

we attempted to allocate from the [mem 0xbff00000-0xbfffffff] gap first,
then the [mem 0xe0000000-0xf7ffffff] gap.

With this patch an architecture can choose to allocate from the top gap
[mem 0xe0000000-0xf7ffffff] first.

We can't do this across the board because iomem_resource.end is initialized
to 0xffffffff_ffffffff on 64-bit architectures, and most machines can't
address the entire 64-bit physical address space.  Therefore, we only
allocate top-down if the arch requests it by clearing
"resource_alloc_from_bottom".

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-26 15:33:31 -07:00
..
2010-08-12 06:38:24 +10:00
2010-09-08 10:50:00 -06:00
2010-08-12 08:43:30 -07:00
2010-08-12 08:43:30 -07:00
2010-08-12 08:43:30 -07:00
2010-08-18 01:09:01 -04:00
2010-09-09 18:57:23 -07:00
2010-08-12 04:14:05 +01:00
2010-08-18 08:35:46 -04:00
2010-08-11 09:23:22 +02:00
2010-08-11 18:21:02 +02:00
2010-08-09 20:45:05 -07:00
2010-08-10 11:49:21 -07:00
2010-08-12 11:27:58 +02:00
2010-10-11 18:15:28 -07:00
2010-09-09 18:57:24 -07:00
2010-08-09 16:48:45 -04:00
2010-09-09 09:05:06 -07:00
2010-08-11 00:29:47 -04:00
2010-02-10 23:49:08 +09:00
2010-10-17 20:03:03 -07:00
2010-10-17 20:03:06 -07:00
2010-08-09 16:47:27 -04:00
2010-09-08 15:04:10 +02:00
2010-09-27 20:24:54 -07:00
2010-08-09 16:48:44 -04:00
2010-08-18 08:35:47 -04:00
2010-08-11 08:59:02 -07:00
2010-09-13 10:26:52 +02:00