Commit 419afdf5 authored Oct 26, 2010 by Bjorn Helgaas Committed by Jesse Barnes Oct 26, 2010

x86: update iomem_resource end based on CPU physical address capabilities



The iomem_resource map reflects the available physical address space.
We statically initialize the end to -1, i.e., 0xffffffff_ffffffff, but
of course we can only use as much as the CPU can address.

This patch updates the end based on the CPU capabilities, so we don't
mistakenly allocate space that isn't usable, as we're likely to do when
allocating from the top-down.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

parent dc9887dc

arch/x86/kernel/setup.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -788,6 +788,7 @@ void __init setup_arch(char **cmdline_p)

		x86_init.oem.arch_setup();

		iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
		setup_memory_map();
		parse_setup_data();
		/* update the e820_saved too */

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