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-rw-r--r--arch/x86/kernel/e820.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index d1f25c831447..c88c23c658c1 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1248,6 +1248,7 @@ void __init e820__memblock_setup(void)
{
int i;
u64 end;
+ u64 addr = 0;
/*
* The bootstrap memblock region count maximum is 128 entries
@@ -1264,13 +1265,21 @@ void __init e820__memblock_setup(void)
struct e820_entry *entry = &e820_table->entries[i];
end = entry->addr + entry->size;
+ if (addr < entry->addr)
+ memblock_reserve(addr, entry->addr - addr);
+ addr = end;
if (end != (resource_size_t)end)
continue;
+ /*
+ * all !E820_TYPE_RAM ranges (including gap ranges) are put
+ * into memblock.reserved to make sure that struct pages in
+ * such regions are not left uninitialized after bootup.
+ */
if (entry->type != E820_TYPE_RAM && entry->type != E820_TYPE_RESERVED_KERN)
- continue;
-
- memblock_add(entry->addr, entry->size);
+ memblock_reserve(entry->addr, entry->size);
+ else
+ memblock_add(entry->addr, entry->size);
}
/* Throw away partial pages: */