Just use the generic anon_inode file system.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
  arch/powerpc/platforms/pseries/cmm.c | 27 ++-------------------------
  1 file changed, 2 insertions(+), 25 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 6d36b858b14df1..9d07e6bea7126c 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c

@@ -6,6 +6,7 @@
   * Author(s): Brian King (brking@linux.vnet.ibm.com),
   */
  
+#include <linux/anon_inodes.h>
  #include <linux/ctype.h>
  #include <linux/delay.h>
  #include <linux/errno.h>

@@ -502,19 +503,6 @@ static struct notifier_block cmm_mem_nb = {
  };
  
  #ifdef CONFIG_BALLOON_COMPACTION
-static struct vfsmount *balloon_mnt;
-
-static int cmm_init_fs_context(struct fs_context *fc)
-{
-	return init_pseudo(fc, PPC_CMM_MAGIC) ? 0 : -ENOMEM;
-}
-
-static struct file_system_type balloon_fs = {
-	.name = "ppc-cmm",
-	.init_fs_context = cmm_init_fs_context,
-	.kill_sb = kill_anon_super,
-};
-
  static int cmm_migratepage(struct balloon_dev_info *b_dev_info,
  			   struct page *newpage, struct page *page,
  			   enum migrate_mode mode)

@@ -573,19 +561,10 @@ static int cmm_balloon_compaction_init(void)
  	balloon_devinfo_init(&b_dev_info);
  	b_dev_info.migratepage = cmm_migratepage;
  
-	balloon_mnt = kern_mount(&balloon_fs);
-	if (IS_ERR(balloon_mnt)) {
-		rc = PTR_ERR(balloon_mnt);
-		balloon_mnt = NULL;
-		return rc;
-	}
-
-	b_dev_info.inode = alloc_anon_inode_sb(balloon_mnt->mnt_sb);
+	b_dev_info.inode = alloc_anon_inode();
  	if (IS_ERR(b_dev_info.inode)) {
  		rc = PTR_ERR(b_dev_info.inode);
  		b_dev_info.inode = NULL;
-		kern_unmount(balloon_mnt);
-		balloon_mnt = NULL;
  		return rc;
  	}
  

@@ -597,8 +576,6 @@ static void cmm_balloon_compaction_deinit(void)
  	if (b_dev_info.inode)
  		iput(b_dev_info.inode);
  	b_dev_info.inode = NULL;
-	kern_unmount(balloon_mnt);
-	balloon_mnt = NULL;
  }
  #else /* CONFIG_BALLOON_COMPACTION */
  static int cmm_balloon_compaction_init(void)