memory-hotplug: preparation to notify memory block's state at memory hot remove

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index ce690a9..dfc0a61 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -874,7 +874,7 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
        return offlined;
 }
 
-static int __ref offline_pages(unsigned long start_pfn,
+static int __ref __offline_pages(unsigned long start_pfn,
                  unsigned long end_pfn, unsigned long timeout)
 {
        unsigned long pfn, nr_pages, expire;
@@ -1007,15 +1007,24 @@ out:
        return ret;
 }
 
+int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
+{
+       return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ);
+}
+
 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);
+       return __offline_pages(start_pfn, end_pfn, 120 * HZ);
 }
 #else
+int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
+{
+       return -EINVAL;
+}
 int remove_memory(u64 start, u64 size)
 {
        return -EINVAL;