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authorBjorn Helgaas <bjorn.helgaas@hp.com>2010-10-27 01:41:49 +0400
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-10-27 02:33:44 +0400
commit419afdf53cca794a190014593b4778e2e9d64cf3 (patch)
tree5d26321ffa10a004c71cc428f1f33f9bb6053602 /arch/x86
parentdc9887dc02e37bcf83f4e792aa14b07782ef54cf (diff)
downloadlinux-419afdf53cca794a190014593b4778e2e9d64cf3.tar.xz
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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/setup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c3a4fbb2b996..922b5a1f978b 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -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 */