--- zzzz-none-000/linux-3.10.107/mm/memblock.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/mm/memblock.c	2021-11-10 11:53:56.000000000 +0000
@@ -102,6 +102,8 @@
 	phys_addr_t this_start, this_end, cand;
 	u64 i;
 
+    memblock_dbg("[%s] start=%#x, end=%#x, size=%#x, align=%#x\n", __func__,start, end, size, align);
+
 	/* pump up @end */
 	if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
 		end = memblock.current_limit;
@@ -368,6 +370,13 @@
 	phys_addr_t obase = base;
 	phys_addr_t end = base + memblock_cap_size(base, &size);
 	int i, nr_new;
+	
+    memblock_dbg("   memblock_add_region: @ %p [%#016llx-%#016llx]  %pF\n",
+             type,
+		     (unsigned long long)base,
+		     (unsigned long long)base + size,
+		     (void *)_RET_IP_);
+
 
 	if (!size)
 		return 0;
@@ -936,6 +945,12 @@
 		 memblock.memory.regions[idx].size) >= end;
 }
 
+int __init_memblock memblock_overlaps_memory(phys_addr_t base, phys_addr_t size)
+{
+	memblock_cap_size(base, &size);
+	return memblock_overlaps_region(&memblock.memory, base, size) >= 0;
+}
+
 /**
  * memblock_is_region_reserved - check if a region intersects reserved memory
  * @base: base of region to check