mm, page_owner: track and print last migrate reason-fix

[Vlastimil Babka]

Move migrate_reason_names from mm/migrate.c to mm/debug.c so that link doesn't
warn with CONFIG_MIGRATION disabled.

---
 include/linux/migrate.h |  2 +-
 mm/debug.c              | 11 +++++++++++
 mm/migrate.c            | 10 ----------
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index ab92a8cf4c93..8fdc033e527a 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -27,7 +27,7 @@ enum migrate_reason {
 	MR_TYPES
 };
 
-/* In mm/migrate.c; also keep sync with include/trace/events/migrate.h */
+/* In mm/debug.c; also keep sync with include/trace/events/migrate.h */
 extern char * migrate_reason_names[MR_TYPES];
 
 #ifdef CONFIG_MIGRATION
diff --git a/mm/debug.c b/mm/debug.c
index d9718fc8377a..a4cd0c093ff6 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -9,6 +9,17 @@
 #include <linux/mm.h>
 #include <linux/trace_events.h>
 #include <linux/memcontrol.h>
+#include <linux/migrate.h>
+
+char *migrate_reason_names[MR_TYPES] = {
+	"compaction",
+	"memory_failure",
+	"memory_hotplug",
+	"syscall_or_cpuset",
+	"mempolicy_mbind",
+	"numa_misplaced",
+	"cma",
+};
 
 static const struct trace_print_flags pageflag_names[] = {
 	{1UL << PG_locked,		"locked"	},
diff --git a/mm/migrate.c b/mm/migrate.c
index 12e9ab9de446..1c11b73cd834 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -47,16 +47,6 @@
 
 #include "internal.h"
 
-char *migrate_reason_names[MR_TYPES] = {
-	"compaction",
-	"memory_failure",
-	"memory_hotplug",
-	"syscall_or_cpuset",
-	"mempolicy_mbind",
-	"numa_misplaced",
-	"cma",
-};
-
 /*
  * migrate_prep() needs to be called before we start compiling a list of pages
  * to be migrated using isolate_lru_page(). If scheduling work on other CPUs is
-- 
2.6.3




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