[RFC][PATCH 08/10] zsmalloc: export zs_pool `num_migrated'

[Sergey Senozhatsky <sergey.senozhatsky@gmail.com>]

introduce zs_get_num_migrated() to export zs_pool's ->num_migrated
counter.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
---
 include/linux/zsmalloc.h | 1 +
 mm/zsmalloc.c            | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
index 1338190..e878875 100644
--- a/include/linux/zsmalloc.h
+++ b/include/linux/zsmalloc.h
@@ -47,6 +47,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle,
 void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
 
 unsigned long zs_get_total_pages(struct zs_pool *pool);
+unsigned long zs_get_num_migrated(struct zs_pool *pool);
 unsigned long zs_compact(struct zs_pool *pool);
 
 #endif
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 70bf481..0524c4a 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1543,6 +1543,13 @@ unsigned long zs_get_total_pages(struct zs_pool *pool)
 }
 EXPORT_SYMBOL_GPL(zs_get_total_pages);
 
+unsigned long zs_get_num_migrated(struct zs_pool *pool)
+{
+	/* can be outdated */
+	return pool->num_migrated;
+}
+EXPORT_SYMBOL_GPL(zs_get_num_migrated);
+
 /**
  * zs_map_object - get address of allocated object from handle.
  * @pool: pool from which the object was allocated
-- 
2.4.2.337.gfae46aa

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