Convert obvious places to deactivate_locked_super()

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

12 files changed, 21 insertions, 42 deletions

diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index 92285d0089c2..af8b42e0a55b 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -74,8 +74,7 @@ static int get_sb_mtd_aux(struct file_system_type *fs_type, int flags,
 
         ret = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
         if (ret < 0) {
-                up_write(&sb->s_umount);
-                deactivate_super(sb);
+                deactivate_locked_super(sb);
                 return ret;
         }
 
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 7d23214e5599..0d29a57c63e6 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -174,10 +174,7 @@ P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
         return 0;
 
 release_sb:
-        if (sb) {
-                up_write(&sb->s_umount);
-                deactivate_super(sb);
-        }
+        deactivate_locked_super(sb);
 
 free_stat:
         kfree(st);
diff --git a/fs/afs/super.c b/fs/afs/super.c
index aee239a048cb..2753f16dd315 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -405,8 +405,7 @@ static int afs_get_sb(struct file_system_type *fs_type,
                 sb->s_flags = flags;
                 ret = afs_fill_super(sb, &params);
                 if (ret < 0) {
-                        up_write(&sb->s_umount);
-                        deactivate_super(sb);
+                        deactivate_locked_super(sb);
                         goto error;
                 }
                 sb->s_options = new_opts;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3536bdb2d7cb..6dfae5b28f59 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -502,8 +502,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
 
         if (s->s_root) {
                 if ((flags ^ s->s_flags) & MS_RDONLY) {
-                        up_write(&s->s_umount);
-                        deactivate_super(s);
+                        deactivate_locked_super(s);
                         error = -EBUSY;
                         goto error_close_devices;
                 }
@@ -517,8 +516,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
                 error = btrfs_fill_super(s, fs_devices, data,
                                          flags & MS_SILENT ? 1 : 0);
                 if (error) {
-                        up_write(&s->s_umount);
-                        deactivate_super(s);
+                        deactivate_locked_super(s);
                         goto error_free_subvol_name;
                 }
 
@@ -535,15 +533,13 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
                 mutex_unlock(&s->s_root->d_inode->i_mutex);
 
                 if (IS_ERR(root)) {
-                        up_write(&s->s_umount);
-                        deactivate_super(s);
+                        deactivate_locked_super(s);
                         error = PTR_ERR(root);
                         goto error_free_subvol_name;
                 }
                 if (!root->d_inode) {
                         dput(root);
-                        up_write(&s->s_umount);
-                        deactivate_super(s);
+                        deactivate_locked_super(s);
                         error = -ENXIO;
                         goto error_free_subvol_name;
                 }
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 355e0efec0cf..5e6d35804d73 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -602,8 +602,7 @@ cifs_get_sb(struct file_system_type *fs_type,
 
         rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
         if (rc) {
-                up_write(&sb->s_umount);
-                deactivate_super(sb);
+                deactivate_locked_super(sb);
                 return rc;
         }
         sb->s_flags |= MS_ACTIVE;
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 63a4a59e4148..21165cf934ff 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -389,11 +389,10 @@ static int devpts_get_sb(struct file_system_type *fs_type,
         return 0;
 
 out_dput:
-        dput(s->s_root);
+        dput(s->s_root); /* undo dget() in simple_set_mnt() */
 
 out_undo_sget:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         return error;
 }
 
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index ccabd5faa04d..9f0aa9883c28 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -614,9 +614,8 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags,
         }
         goto out;
 out_abort:
-        dput(sb->s_root);
-        up_write(&sb->s_umount);
-        deactivate_super(sb);
+        dput(sb->s_root); /* aka mnt->mnt_root, as set by get_sb_nodev() */
+        deactivate_locked_super(sb);
 out:
         return rc;
 }
diff --git a/fs/libfs.c b/fs/libfs.c
index cd223190c4e9..80046ddf5063 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -246,8 +246,7 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name,
         return 0;
 
 Enomem:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         return -ENOMEM;
 }
 
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1679a164c8c9..d2d67781c579 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2111,8 +2111,7 @@ out_err_nosb:
 error_splat_root:
         dput(mntroot);
 error_splat_super:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         goto out;
 }
 
@@ -2208,8 +2207,7 @@ out_err_noserver:
         return error;
 
 error_splat_super:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
         return error;
 }
@@ -2469,8 +2467,7 @@ out_free:
 error_splat_root:
         dput(mntroot);
 error_splat_super:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         goto out;
 }
 
@@ -2564,8 +2561,7 @@ out_err_noserver:
         return error;
 
 error_splat_super:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
         return error;
 }
@@ -2649,8 +2645,7 @@ out_err_noserver:
         return error;
 
 error_splat_super:
-        up_write(&s->s_umount);
-        deactivate_super(s);
+        deactivate_locked_super(s);
         dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
         return error;
 }
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 1e15a2b176e8..b080b791d9e3 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -67,8 +67,7 @@ static int proc_get_sb(struct file_system_type *fs_type,
                 sb->s_flags = flags;
                 err = proc_fill_super(sb);
                 if (err) {
-                        up_write(&sb->s_umount);
-                        deactivate_super(sb);
+                        deactivate_locked_super(sb);
                         return err;
                 }
 
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index faa44f90608a..e9f7a754c4f7 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2055,8 +2055,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
         return 0;
 
 out_deact:
-        up_write(&sb->s_umount);
-        deactivate_super(sb);
+        deactivate_locked_super(sb);
 out_close:
         ubi_close_volume(ubi);
         return err;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 382109b5baeb..a7267bfd3765 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1133,8 +1133,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
  free_cg_links:
         free_cg_links(&tmp_cg_links);
  drop_new_super:
-        up_write(&sb->s_umount);
-        deactivate_super(sb);
+        deactivate_locked_super(sb);
         return ret;
 }