1 files changed, 11 insertions, 1 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 89fee2dcb039..c299d083d8e2 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
+#include <linux/pfn.h>
 
 #include <asm/tlbflush.h>
 
@@ -849,10 +850,19 @@ failed_removal:
 
         return ret;
 }
+
+int remove_memory(u64 start, u64 size)
+{
+        unsigned long start_pfn, end_pfn;
+
+        start_pfn = PFN_DOWN(start);
+        end_pfn = start_pfn + PFN_DOWN(size);
+        return offline_pages(start_pfn, end_pfn, 120 * HZ);
+}
 #else
 int remove_memory(u64 start, u64 size)
 {
         return -EINVAL;
 }
-EXPORT_SYMBOL_GPL(remove_memory);
 #endif /* CONFIG_MEMORY_HOTREMOVE */
+EXPORT_SYMBOL_GPL(remove_memory);