Bury __put_super_and_need_restart()

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/drop_caches.c

@@ -8,6 +8,7 @@
 #include <linux/writeback.h>
 #include <linux/sysctl.h>
 #include <linux/gfp.h>
+#include "internal.h"
 
 /* A global variable is a bit ugly, but it keeps the code simple */
 int sysctl_drop_caches;

fs/internal.h

@@ -87,6 +87,8 @@ extern struct file *get_empty_filp(void);
  * super.c
  */
 extern int do_remount_sb(struct super_block *, int, void *, int);
+extern void __put_super(struct super_block *sb);
+extern void put_super(struct super_block *sb);
 
 /*
  * open.c

fs/quota/quota.c

@@ -18,6 +18,7 @@
 #include <linux/quotaops.h>
 #include <linux/types.h>
 #include <linux/writeback.h>
+#include "../internal.h"
 
 static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
 				     qid_t id)

fs/super.c

@@ -127,40 +127,14 @@ static inline void destroy_super(struct super_block *s)
 /* Superblock refcounting  */
 
 /*
- * Drop a superblock's refcount.  Returns non-zero if the superblock was
- * destroyed.  The caller must hold sb_lock.
+ * Drop a superblock's refcount.  The caller must hold sb_lock.
  */
-int __put_super(struct super_block *sb)
+void __put_super(struct super_block *sb)
 {
-	int ret = 0;
-
 	if (!--sb->s_count) {
 		list_del_init(&sb->s_list);
 		destroy_super(sb);
-		ret = 1;
-	}
-	return ret;
-}
-
-/*
- * Drop a superblock's refcount.
- * Returns non-zero if the superblock is about to be destroyed and
- * at least is already removed from super_blocks list, so if we are
- * making a loop through super blocks then we need to restart.
- * The caller must hold sb_lock.
- */
-int __put_super_and_need_restart(struct super_block *sb)
-{
-	/* check for race with generic_shutdown_super() */
-	if (list_empty(&sb->s_instances)) {
-		/* super block is removed, need to restart... */
-		__put_super(sb);
-		return 1;
 	}
-	/* can't be the last, since s_list is still in use */
-	sb->s_count--;
-	BUG_ON(sb->s_count == 0);
-	return 0;
 }
 
 /**

include/linux/fs.h

@@ -1778,9 +1778,6 @@ extern int get_sb_pseudo(struct file_system_type *, char *,
 	const struct super_operations *ops, unsigned long,
 	struct vfsmount *mnt);
 extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
-int __put_super_and_need_restart(struct super_block *sb);
-int __put_super(struct super_block *sb);
-void put_super(struct super_block *sb);
 
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \