Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6

[cascardo/linux.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 380aef4..2047465 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,6 +26,7 @@
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
 #include <linux/pfn.h>
+#include <linux/suspend.h>
 
 #include <asm/tlbflush.h>
 
@@ -485,14 +486,18 @@ int __ref add_memory(int nid, u64 start, u64 size)
        struct resource *res;
        int ret;
 
+       lock_system_sleep();
+
        res = register_memory_resource(start, size);
+       ret = -EEXIST;
        if (!res)
-               return -EEXIST;
+               goto out;
 
        if (!node_online(nid)) {
                pgdat = hotadd_new_pgdat(nid, start);
+               ret = -ENOMEM;
                if (!pgdat)
-                       return -ENOMEM;
+                       goto out;
                new_pgdat = 1;
        }
 
@@ -515,7 +520,8 @@ int __ref add_memory(int nid, u64 start, u64 size)
                BUG_ON(ret);
        }
 
-       return ret;
+       goto out;
+
 error:
        /* rollback pgdat allocation and others */
        if (new_pgdat)
@@ -523,6 +529,8 @@ error:
        if (res)
                release_memory_resource(res);
 
+out:
+       unlock_system_sleep();
        return ret;
 }
 EXPORT_SYMBOL_GPL(add_memory);
@@ -759,6 +767,8 @@ int offline_pages(unsigned long start_pfn,
        if (!test_pages_in_a_zone(start_pfn, end_pfn))
                return -EINVAL;
 
+       lock_system_sleep();
+
        zone = page_zone(pfn_to_page(start_pfn));
        node = zone_to_nid(zone);
        nr_pages = end_pfn - start_pfn;
@@ -766,7 +776,7 @@ int offline_pages(unsigned long start_pfn,
        /* set above range as isolated */
        ret = start_isolate_page_range(start_pfn, end_pfn);
        if (ret)
-               return ret;
+               goto out;
 
        arg.start_pfn = start_pfn;
        arg.nr_pages = nr_pages;
@@ -844,6 +854,7 @@ repeat:
        writeback_set_ratelimit();
 
        memory_notify(MEM_OFFLINE, &arg);
+       unlock_system_sleep();
        return 0;
 
 failed_removal:
@@ -853,6 +864,8 @@ failed_removal:
        /* pushback to free area */
        undo_isolate_page_range(start_pfn, end_pfn);
 
+out:
+       unlock_system_sleep();
        return ret;
 }