[PATCH v4 01/48] mm: move some shrinker-related function declarations to mm/internal.h

[Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>]

The following functions are only used inside the mm subsystem, so it's
better to move their declarations to the mm/internal.h file.

1. shrinker_debugfs_add()
2. shrinker_debugfs_detach()
3. shrinker_debugfs_remove()

Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
---
 include/linux/shrinker.h | 19 -------------------
 mm/internal.h            | 28 ++++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 19 deletions(-)

diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
index 224293b2dd06..8dc15aa37410 100644
--- a/include/linux/shrinker.h
+++ b/include/linux/shrinker.h
@@ -106,28 +106,9 @@ extern void free_prealloced_shrinker(struct shrinker 
*shrinker);
 extern void synchronize_shrinkers(void);
 
 #ifdef CONFIG_SHRINKER_DEBUG
-extern int shrinker_debugfs_add(struct shrinker *shrinker);
-extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
-                                             int *debugfs_id);
-extern void shrinker_debugfs_remove(struct dentry *debugfs_entry,
-                                   int debugfs_id);
 extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker,
                                                  const char *fmt, ...);
 #else /* CONFIG_SHRINKER_DEBUG */
-static inline int shrinker_debugfs_add(struct shrinker *shrinker)
-{
-       return 0;
-}
-static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
-                                                    int *debugfs_id)
-{
-       *debugfs_id = -1;
-       return NULL;
-}
-static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry,
-                                          int debugfs_id)
-{
-}
 static inline __printf(2, 3)
 int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...)
 {
diff --git a/mm/internal.h b/mm/internal.h
index 154da4f0d557..6f21926393af 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1143,4 +1143,32 @@ struct vma_prepare {
        struct vm_area_struct *remove;
        struct vm_area_struct *remove2;
 };
+
+/*
+ * shrinker related functions
+ */
+
+#ifdef CONFIG_SHRINKER_DEBUG
+extern int shrinker_debugfs_add(struct shrinker *shrinker);
+extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
+                                             int *debugfs_id);
+extern void shrinker_debugfs_remove(struct dentry *debugfs_entry,
+                                   int debugfs_id);
+#else /* CONFIG_SHRINKER_DEBUG */
+static inline int shrinker_debugfs_add(struct shrinker *shrinker)
+{
+       return 0;
+}
+static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker,
+                                                    int *debugfs_id)
+{
+       *debugfs_id = -1;
+       return NULL;
+}
+static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry,
+                                          int debugfs_id)
+{
+}
+#endif /* CONFIG_SHRINKER_DEBUG */
+
 #endif /* __MM_INTERNAL_H */
-- 
2.30.2