Use kill_litter_super() in autofs4 ->kill_sb()

... and get rid of open-coding its guts (i.e. RIP autofs4_force_release())

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

diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 4670a78..821b2b9 100644 (file)
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -96,63 +96,6 @@ void autofs4_free_ino(struct autofs_info *ino)
        kfree(ino);
 }
 
-/*
- * Deal with the infamous "Busy inodes after umount ..." message.
- *
- * Clean up the dentry tree. This happens with autofs if the user
- * space program goes away due to a SIGKILL, SIGSEGV etc.
- */
-static void autofs4_force_release(struct autofs_sb_info *sbi)
-{
-       struct dentry *this_parent = sbi->sb->s_root;
-       struct list_head *next;
-
-       if (!sbi->sb->s_root)
-               return;
-
-       spin_lock(&dcache_lock);
-repeat:
-       next = this_parent->d_subdirs.next;
-resume:
-       while (next != &this_parent->d_subdirs) {
-               struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child);
-
-               /* Negative dentry - don`t care */
-               if (!simple_positive(dentry)) {
-                       next = next->next;
-                       continue;
-               }
-
-               if (!list_empty(&dentry->d_subdirs)) {
-                       this_parent = dentry;
-                       goto repeat;
-               }
-
-               next = next->next;
-               spin_unlock(&dcache_lock);
-
-               DPRINTK("dentry %p %.*s",
-                       dentry, (int)dentry->d_name.len, dentry->d_name.name);
-
-               dput(dentry);
-               spin_lock(&dcache_lock);
-       }
-
-       if (this_parent != sbi->sb->s_root) {
-               struct dentry *dentry = this_parent;
-
-               next = this_parent->d_u.d_child.next;
-               this_parent = this_parent->d_parent;
-               spin_unlock(&dcache_lock);
-               DPRINTK("parent dentry %p %.*s",
-                       dentry, (int)dentry->d_name.len, dentry->d_name.name);
-               dput(dentry);
-               spin_lock(&dcache_lock);
-               goto resume;
-       }
-       spin_unlock(&dcache_lock);
-}
-
 void autofs4_kill_sb(struct super_block *sb)
 {
        struct autofs_sb_info *sbi = autofs4_sbi(sb);
@@ -169,15 +112,12 @@ void autofs4_kill_sb(struct super_block *sb)
        /* Free wait queues, close pipe */
        autofs4_catatonic_mode(sbi);
 
-       /* Clean up and release dangling references */
-       autofs4_force_release(sbi);
-
        sb->s_fs_info = NULL;
        kfree(sbi);
 
 out_kill_sb:
        DPRINTK("shutting down");
-       kill_anon_super(sb);
+       kill_litter_super(sb);
 }
 
 static int autofs4_show_options(struct seq_file *m, struct vfsmount *mnt)