x86: allocate space within a region top-down
commit1af3c2e45e7a641e774bbb84fa428f2f0bf2d9c9
authorBjorn Helgaas <bjorn.helgaas@hp.com>
Tue, 26 Oct 2010 21:41:54 +0000 (26 15:41 -0600)
committerJesse Barnes <jbarnes@virtuousgeek.org>
Tue, 26 Oct 2010 22:33:45 +0000 (26 15:33 -0700)
tree039efdb6eecc9d28e7bef5486a1b02527838c23d
parent419afdf53cca794a190014593b4778e2e9d64cf3
x86: allocate space within a region top-down

Request that allocate_resource() use available space from high addresses
first, rather than the default of using low addresses first.

The most common place this makes a difference is when we move or assign
new PCI device resources.  Low addresses are generally scarce, so it's
better to use high addresses when possible.  This follows Windows practice
for PCI allocation.

Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228#c42
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
arch/x86/kernel/setup.c