memory_hotplug: introduce memhp_default_state= command line parameter

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

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index fcafbfcff044e9e42a0e09e641741ee1178fd0c1..caf2a14c37ada40b4d690eaae18e6d72cd274d9b 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -85,6 +85,17 @@ bool memhp_auto_online = true;
 #endif
 EXPORT_SYMBOL_GPL(memhp_auto_online);
 
+static int __init setup_memhp_default_state(char *str)
+{
+       if (!strcmp(str, "online"))
+               memhp_auto_online = true;
+       else if (!strcmp(str, "offline"))
+               memhp_auto_online = false;
+
+       return 1;
+}
+__setup("memhp_default_state=", setup_memhp_default_state);
+
 void get_online_mems(void)
 {
        might_sleep();