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-rw-r--r--arch/x86/kernel/e820.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 7271fa33d791..5cb5725b2bae 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -627,10 +627,9 @@ __init void e820_setup_gap(void)
#ifdef CONFIG_X86_64
if (!found) {
gapstart = (max_pfn << PAGE_SHIFT) + 1024*1024;
- printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
- "address range\n"
- KERN_ERR "PCI: Unassigned devices with 32bit resource "
- "registers may break!\n");
+ printk(KERN_ERR
+ "PCI: Warning: Cannot find a gap in the 32bit address range\n"
+ "PCI: Unassigned devices with 32bit resource registers may break!\n");
}
#endif
@@ -1383,6 +1382,8 @@ static unsigned long ram_alignment(resource_size_t pos)
return 32*1024*1024;
}
+#define MAX_RESOURCE_SIZE ((resource_size_t)-1)
+
void __init e820_reserve_resources_late(void)
{
int i;
@@ -1400,17 +1401,19 @@ void __init e820_reserve_resources_late(void)
* avoid stolen RAM:
*/
for (i = 0; i < e820.nr_map; i++) {
- struct e820entry *entry = &e820_saved.map[i];
- resource_size_t start, end;
+ struct e820entry *entry = &e820.map[i];
+ u64 start, end;
if (entry->type != E820_RAM)
continue;
start = entry->addr + entry->size;
- end = round_up(start, ram_alignment(start));
- if (start == end)
+ end = round_up(start, ram_alignment(start)) - 1;
+ if (end > MAX_RESOURCE_SIZE)
+ end = MAX_RESOURCE_SIZE;
+ if (start >= end)
continue;
- reserve_region_with_split(&iomem_resource, start,
- end - 1, "RAM buffer");
+ reserve_region_with_split(&iomem_resource, start, end,
+ "RAM buffer");
}
}