mm: move swp_entry_t definition to include/linux/mm_types.h
swp_entry_t being defined in include/linux/swap.h instead of
include/linux/mm_types.h causes cyclic include dependency later when
include/linux/page_cgroup.h is included from writeback path. Move the
definition to include/linux/mm_types.h.
While at it, reformat the comment above it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index bf9f575..fc2daff 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -534,4 +534,12 @@
NR_TLB_FLUSH_REASONS,
};
+ /*
+ * A swap entry has to fit into a "unsigned long", as the entry is hidden
+ * in the "index" field of the swapper address space.
+ */
+typedef struct {
+ unsigned long val;
+} swp_entry_t;
+
#endif /* _LINUX_MM_TYPES_H */
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 37a585b..34e8b60 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -102,14 +102,6 @@
} info;
};
- /* A swap entry has to fit into a "unsigned long", as
- * the entry is hidden in the "index" field of the
- * swapper address space.
- */
-typedef struct {
- unsigned long val;
-} swp_entry_t;
-
/*
* current->reclaim_state points to one of these when a task is running
* memory reclaim