1 files changed, 23 insertions, 15 deletions

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 0900b3910cda..405573010f99 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -105,27 +105,35 @@ static void __init __free_pages_memory(unsigned long start, unsigned long end)
                 __free_pages_bootmem(pfn_to_page(i), 0);
 }
 
+static unsigned long __init __free_memory_core(phys_addr_t start,
+                                 phys_addr_t end)
+{
+        unsigned long start_pfn = PFN_UP(start);
+        unsigned long end_pfn = min_t(unsigned long,
+                                      PFN_DOWN(end), max_low_pfn);
+
+        if (start_pfn > end_pfn)
+                return 0;
+
+        __free_pages_memory(start_pfn, end_pfn);
+
+        return end_pfn - start_pfn;
+}
+
 unsigned long __init free_low_memory_core_early(int nodeid)
 {
         unsigned long count = 0;
-        phys_addr_t start, end;
+        phys_addr_t start, end, size;
         u64 i;
 
-        /* free reserved array temporarily so that it's treated as free area */
-        memblock_free_reserved_regions();
-
-        for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) {
-                unsigned long start_pfn = PFN_UP(start);
-                unsigned long end_pfn = min_t(unsigned long,
-                                              PFN_DOWN(end), max_low_pfn);
-                if (start_pfn < end_pfn) {
-                        __free_pages_memory(start_pfn, end_pfn);
-                        count += end_pfn - start_pfn;
-                }
-        }
+        for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL)
+                count += __free_memory_core(start, end);
+
+        /* free range that is used for reserved array if we allocate it */
+        size = get_allocated_memblock_reserved_regions_info(&start);
+        if (size)
+                count += __free_memory_core(start, start + size);
 
-        /* put region array back? */
-        memblock_reserve_reserved_regions();
         return count;
 }