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-rw-r--r--mm/memblock.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 3c47450..a925866 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/bitops.h>
+#include <linux/poison.h>
#include <linux/memblock.h>
struct memblock memblock;
@@ -112,6 +113,10 @@ void __init memblock_init(void)
memblock.reserved.regions = memblock_reserved_init_regions;
memblock.reserved.max = INIT_MEMBLOCK_REGIONS;
+ /* Write a marker in the unused last array entry */
+ memblock.memory.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE;
+ memblock.reserved.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE;
+
/* Create a dummy zero size MEMBLOCK which will get coalesced away later.
* This simplifies the memblock_add() code below...
*/
@@ -131,6 +136,12 @@ void __init memblock_analyze(void)
{
int i;
+ /* Check marker in the unused last array entry */
+ WARN_ON(memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS].base
+ != (phys_addr_t)RED_INACTIVE);
+ WARN_ON(memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS].base
+ != (phys_addr_t)RED_INACTIVE);
+
memblock.memory_size = 0;
for (i = 0; i < memblock.memory.cnt; i++)
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