33 files changed, 133 insertions, 12 deletions

diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index dd9becca424..0ec5aaf47aa 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -132,11 +132,15 @@ static void adfs_put_super(struct super_block *sb)
         int i;
         struct adfs_sb_info *asb = ADFS_SB(sb);
 
+        lock_kernel();
+
         for (i = 0; i < asb->s_map_size; i++)
                 brelse(asb->s_map[i].dm_bh);
         kfree(asb->s_map);
         kfree(asb);
         sb->s_fs_info = NULL;
+
+        unlock_kernel();
 }
 
 static int adfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 63f5183f263..d7386462a8e 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -29,6 +29,8 @@ affs_put_super(struct super_block *sb)
         struct affs_sb_info *sbi = AFFS_SB(sb);
         pr_debug("AFFS: put_super()\n");
 
+        lock_kernel();
+
         if (!(sb->s_flags & MS_RDONLY)) {
                 AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1);
                 secs_to_datestamp(get_seconds(),
@@ -42,7 +44,8 @@ affs_put_super(struct super_block *sb)
         affs_brelse(sbi->s_root_bh);
         kfree(sbi);
         sb->s_fs_info = NULL;
-        return;
+
+        unlock_kernel();
 }
 
 static void
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 76828e5f8a3..ad0514d0115 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -440,8 +440,12 @@ static void afs_put_super(struct super_block *sb)
 
         _enter("");
 
+        lock_kernel();
+
         afs_put_volume(as->volume);
 
+        unlock_kernel();
+
         _leave("");
 }
 
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 76afd0d6b86..9367b6297d8 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -737,6 +737,8 @@ parse_options(char *options, befs_mount_options * opts)
 static void
 befs_put_super(struct super_block *sb)
 {
+        lock_kernel();
+
         kfree(BEFS_SB(sb)->mount_opts.iocharset);
         BEFS_SB(sb)->mount_opts.iocharset = NULL;
 
@@ -747,7 +749,8 @@ befs_put_super(struct super_block *sb)
 
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
-        return;
+
+        unlock_kernel();
 }
 
 /* Allocate private field of the superblock, fill it.
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 4cf3d269e27..3a9a1361fdc 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -217,6 +217,8 @@ static void bfs_put_super(struct super_block *s)
         if (!info)
                 return;
 
+        lock_kernel();
+
         if (s->s_dirt)
                 bfs_write_super(s);
 
@@ -225,6 +227,8 @@ static void bfs_put_super(struct super_block *s)
         kfree(info->si_imap);
         kfree(info);
         s->s_fs_info = NULL;
+
+        unlock_kernel();
 }
 
 static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 0a10a59b639..0d92114195a 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -204,6 +204,9 @@ cifs_put_super(struct super_block *sb)
                 cFYI(1, ("Empty cifs superblock info passed to unmount"));
                 return;
         }
+
+        lock_kernel();
+
         rc = cifs_umount(sb, cifs_sb);
         if (rc)
                 cERROR(1, ("cifs_umount failed with return code %d", rc));
@@ -216,7 +219,8 @@ cifs_put_super(struct super_block *sb)
 
         unload_nls(cifs_sb->local_nls);
         kfree(cifs_sb);
-        return;
+
+        unlock_kernel();
 }
 
 static int
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index fa4c7e7d15d..12d649602d3 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -27,6 +27,7 @@
 #include <linux/mount.h>
 #include <linux/key.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/file.h>
 #include <linux/crypto.h>
 #include "ecryptfs_kernel.h"
@@ -120,9 +121,13 @@ static void ecryptfs_put_super(struct super_block *sb)
 {
         struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb);
 
+        lock_kernel();
+
         ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
         kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
         ecryptfs_set_superblock_private(sb, NULL);
+
+        unlock_kernel();
 }
 
 /**
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 3cdb761db8a..cd1f8b18a21 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -258,6 +258,8 @@ static void exofs_put_super(struct super_block *sb)
         int num_pend;
         struct exofs_sb_info *sbi = sb->s_fs_info;
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 exofs_write_super(sb);
 
@@ -274,6 +276,8 @@ static void exofs_put_super(struct super_block *sb)
         osduld_put_device(sbi->s_dev);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
+
+        unlock_kernel();
 }
 
 /*
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 932a2bcb690..a44963d8edb 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -114,6 +114,8 @@ static void ext2_put_super (struct super_block * sb)
         int i;
         struct ext2_sb_info *sbi = EXT2_SB(sb);
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 ext2_write_super(sb);
 
@@ -138,7 +140,7 @@ static void ext2_put_super (struct super_block * sb)
         kfree(sbi->s_blockgroup_lock);
         kfree(sbi);
 
-        return;
+        unlock_kernel();
 }
 
 static struct kmem_cache * ext2_inode_cachep;
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 1efd958687e..546b8d732bf 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -398,6 +398,8 @@ static void ext3_put_super (struct super_block * sb)
         struct ext3_super_block *es = sbi->s_es;
         int i, err;
 
+        lock_kernel();
+
         ext3_xattr_put_super(sb);
         err = journal_destroy(sbi->s_journal);
         sbi->s_journal = NULL;
@@ -446,7 +448,8 @@ static void ext3_put_super (struct super_block * sb)
         sb->s_fs_info = NULL;
         kfree(sbi->s_blockgroup_lock);
         kfree(sbi);
-        return;
+
+        unlock_kernel();
 }
 
 static struct kmem_cache *ext3_inode_cachep;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0d3034c5e8a..1d4180b8677 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -577,6 +577,7 @@ static void ext4_put_super(struct super_block *sb)
         int i, err;
 
         lock_super(sb);
+        lock_kernel();
         if (sb->s_dirt)
                 ext4_write_super(sb);
 
@@ -646,7 +647,6 @@ static void ext4_put_super(struct super_block *sb)
         unlock_super(sb);
         kobject_put(&sbi->s_kobj);
         wait_for_completion(&sbi->s_kobj_unregister);
-        lock_kernel();
         kfree(sbi->s_blockgroup_lock);
         kfree(sbi);
 }
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 4978621511b..2b88c93af22 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -451,6 +451,8 @@ static void fat_put_super(struct super_block *sb)
 {
         struct msdos_sb_info *sbi = MSDOS_SB(sb);
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 fat_write_super(sb);
 
@@ -470,6 +472,8 @@ static void fat_put_super(struct super_block *sb)
 
         sb->s_fs_info = NULL;
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 static struct kmem_cache *fat_inode_cachep;
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 1dacda83157..cdbd1654e4c 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -80,12 +80,16 @@ vxfs_put_super(struct super_block *sbp)
 {
         struct vxfs_sb_info     *infp = VXFS_SBI(sbp);
 
+        lock_kernel();
+
         vxfs_put_fake_inode(infp->vsi_fship);
         vxfs_put_fake_inode(infp->vsi_ilist);
         vxfs_put_fake_inode(infp->vsi_stilist);
 
         brelse(infp->vsi_bp);
         kfree(infp);
+
+        unlock_kernel();
 }
 
 /**
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 0a680133647..c8930b31cdf 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -719,6 +719,8 @@ static void gfs2_put_super(struct super_block *sb)
         int error;
         struct gfs2_jdesc *jd;
 
+        lock_kernel();
+
         /*  Unfreeze the filesystem, if we need to  */
 
         mutex_lock(&sdp->sd_freeze_lock);
@@ -785,6 +787,8 @@ restart:
 
         /*  At this point, we're through participating in the lockspace  */
         gfs2_sys_fs_del(sdp);
+
+        unlock_kernel();
 }
 
 /**
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index e071e6d0646..9f5eaa01cc7 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -65,11 +65,15 @@ static void hfs_write_super(struct super_block *sb)
  */
 static void hfs_put_super(struct super_block *sb)
 {
+        lock_kernel();
+
         if (sb->s_dirt)
                 hfs_write_super(sb);
         hfs_mdb_close(sb);
         /* release the MDB's resources */
         hfs_mdb_put(sb);
+
+        unlock_kernel();
 }
 
 /*
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 40bdab79dae..9b292dcc39c 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -199,6 +199,9 @@ static void hfsplus_put_super(struct super_block *sb)
         dprint(DBG_SUPER, "hfsplus_put_super\n");
         if (!sb->s_fs_info)
                 return;
+
+        lock_kernel();
+
         if (sb->s_dirt)
                 hfsplus_write_super(sb);
         if (!(sb->s_flags & MS_RDONLY) && HFSPLUS_SB(sb).s_vhdr) {
@@ -220,6 +223,8 @@ static void hfsplus_put_super(struct super_block *sb)
                 unload_nls(HFSPLUS_SB(sb).nls);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
+
+        unlock_kernel();
 }
 
 static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index fc77965be84..437a32e9dea 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -99,11 +99,16 @@ int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
 static void hpfs_put_super(struct super_block *s)
 {
         struct hpfs_sb_info *sbi = hpfs_sb(s);
+
+        lock_kernel();
+
         kfree(sbi->sb_cp_table);
         kfree(sbi->sb_bmp_dir);
         unmark_dirty(s);
         s->s_fs_info = NULL;
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index b4cbe9603c7..068b34b5a10 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -42,11 +42,16 @@ static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qst
 static void isofs_put_super(struct super_block *sb)
 {
         struct isofs_sb_info *sbi = ISOFS_SB(sb);
+
 #ifdef CONFIG_JOLIET
+        lock_kernel();
+
         if (sbi->s_nls_iocharset) {
                 unload_nls(sbi->s_nls_iocharset);
                 sbi->s_nls_iocharset = NULL;
         }
+
+        unlock_kernel();
 #endif
 
         kfree(sbi);
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 5059e9633ed..37b12125c12 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -174,6 +174,8 @@ static void jffs2_put_super (struct super_block *sb)
 
         D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n"));
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 jffs2_write_super(sb);
 
@@ -195,6 +197,8 @@ static void jffs2_put_super (struct super_block *sb)
         if (c->mtd->sync)
                 c->mtd->sync(c->mtd);
 
+        unlock_kernel();
+
         D1(printk(KERN_DEBUG "jffs2_put_super returning\n"));
 }
 
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index d9b0e92b360..3eb13adf386 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -183,6 +183,9 @@ static void jfs_put_super(struct super_block *sb)
         int rc;
 
         jfs_info("In jfs_put_super");
+
+        lock_kernel();
+
         rc = jfs_umount(sb);
         if (rc)
                 jfs_err("jfs_umount failed with return code %d", rc);
@@ -195,6 +198,8 @@ static void jfs_put_super(struct super_block *sb)
         sbi->direct_inode = NULL;
 
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 enum {
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index daad3c2740d..7eb53970f4b 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -35,6 +35,8 @@ static void minix_put_super(struct super_block *sb)
         int i;
         struct minix_sb_info *sbi = minix_sb(sb);
 
+        lock_kernel();
+
         if (!(sb->s_flags & MS_RDONLY)) {
                 if (sbi->s_version != MINIX_V3)  /* s_state is now out from V3 sb */
                         sbi->s_ms->s_state = sbi->s_mount_state;
@@ -49,7 +51,7 @@ static void minix_put_super(struct super_block *sb)
         sb->s_fs_info = NULL;
         kfree(sbi);
 
-        return;
+        unlock_kernel();
 }
 
 static struct kmem_cache * minix_inode_cachep;
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index d642f0e5b36..b99ce205b1b 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -736,6 +736,8 @@ static void ncp_put_super(struct super_block *sb)
 {
         struct ncp_server *server = NCP_SBP(sb);
 
+        lock_kernel();
+
         ncp_lock_server(server);
         ncp_disconnect(server);
         ncp_unlock_server(server);
@@ -769,6 +771,8 @@ static void ncp_put_super(struct super_block *sb)
         vfree(server->packet);
         sb->s_fs_info = NULL;
         kfree(server);
+
+        unlock_kernel();
 }
 
 static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 7901d8cbb9b..7262e8427c2 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -316,6 +316,8 @@ static void nilfs_put_super(struct super_block *sb)
         struct nilfs_sb_info *sbi = NILFS_SB(sb);
         struct the_nilfs *nilfs = sbi->s_nilfs;
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 nilfs_write_super(sb);
 
@@ -333,6 +335,8 @@ static void nilfs_put_super(struct super_block *sb)
         sbi->s_super = NULL;
         sb->s_fs_info = NULL;
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 /**
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 6aa7c471353..a9ec4e1084e 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2246,6 +2246,9 @@ static void ntfs_put_super(struct super_block *sb)
         ntfs_volume *vol = NTFS_SB(sb);
 
         ntfs_debug("Entering.");
+
+        lock_kernel();
+
 #ifdef NTFS_RW
         /*
          * Commit all inodes while they are still open in case some of them
@@ -2444,7 +2447,8 @@ static void ntfs_put_super(struct super_block *sb)
         }
         sb->s_fs_info = NULL;
         kfree(vol);
-        return;
+
+        unlock_kernel();
 }
 
 /**
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 3eb076ce4c0..02737596b59 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1536,9 +1536,13 @@ static void ocfs2_put_super(struct super_block *sb)
 {
         mlog_entry("(0x%p)\n", sb);
 
+        lock_kernel();
+
         ocfs2_sync_blockdev(sb);
         ocfs2_dismount_volume(sb, 0);
 
+        unlock_kernel();
+
         mlog_exit_void();
 }
 
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 3da0401c0a9..90dcb7b033e 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -465,6 +465,8 @@ static void reiserfs_put_super(struct super_block *s)
         struct reiserfs_transaction_handle th;
         th.t_trans_id = 0;
 
+        lock_kernel();
+
         if (s->s_dirt)
                 reiserfs_write_super(s);
 
@@ -500,7 +502,7 @@ static void reiserfs_put_super(struct super_block *s)
         kfree(s->s_fs_info);
         s->s_fs_info = NULL;
 
-        return;
+        unlock_kernel();
 }
 
 static struct kmem_cache *reiserfs_inode_cachep;
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index fc27fbfc539..1402d2d54f5 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -474,6 +474,8 @@ smb_put_super(struct super_block *sb)
 {
         struct smb_sb_info *server = SMB_SB(sb);
 
+        lock_kernel();
+
         smb_lock_server(server);
         server->state = CONN_INVALID;
         smbiod_unregister_server(server);
@@ -489,6 +491,8 @@ smb_put_super(struct super_block *sb)
         smb_unlock_server(server);
         put_pid(server->conn_pid);
         kfree(server);
+
+        unlock_kernel();
 }
 
 static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 0adc624c956..3b52770f46f 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -338,6 +338,8 @@ static int squashfs_remount(struct super_block *sb, int *flags, char *data)
 
 static void squashfs_put_super(struct super_block *sb)
 {
+        lock_kernel();
+
         if (sb->s_fs_info) {
                 struct squashfs_sb_info *sbi = sb->s_fs_info;
                 squashfs_cache_delete(sbi->block_cache);
@@ -350,6 +352,8 @@ static void squashfs_put_super(struct super_block *sb)
                 kfree(sb->s_fs_info);
                 sb->s_fs_info = NULL;
         }
+
+        unlock_kernel();
 }
 
 
diff --git a/fs/super.c b/fs/super.c
index 54fd331f0ca..bdd7158b785 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -309,7 +309,6 @@ void generic_shutdown_super(struct super_block *sb)
 
                 /* bad name - it should be evict_inodes() */
                 invalidate_inodes(sb);
-                lock_kernel();
 
                 if (sop->put_super)
                         sop->put_super(sb);
@@ -320,8 +319,6 @@ void generic_shutdown_super(struct super_block *sb)
                            "Self-destruct in 5 seconds.  Have a nice day...\n",
                            sb->s_id);
                 }
-
-                unlock_kernel();
                 put_fs_excl();
         }
         spin_lock(&sb_lock);
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index cd80316302c..a8189864c24 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -72,6 +72,8 @@ static void sysv_put_super(struct super_block *sb)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
 
+        lock_kernel();
+
         if (sb->s_dirt)
                 sysv_write_super(sb);
 
@@ -87,6 +89,8 @@ static void sysv_put_super(struct super_block *sb)
                 brelse(sbi->s_bh2);
 
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 84f3c7fd155..522c3fd7eb3 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1684,6 +1684,9 @@ static void ubifs_put_super(struct super_block *sb)
 
         ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num,
                   c->vi.vol_id);
+
+        lock_kernel();
+
         /*
          * The following asserts are only valid if there has not been a failure
          * of the media. For example, there will be dirty inodes if we failed
@@ -1750,6 +1753,8 @@ static void ubifs_put_super(struct super_block *sb)
         ubi_close_volume(c->ubi);
         mutex_unlock(&c->umount_mutex);
         kfree(c);
+
+        unlock_kernel();
 }
 
 static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 0ba44107d8f..04802cc39b1 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -2062,6 +2062,9 @@ static void udf_put_super(struct super_block *sb)
         struct udf_sb_info *sbi;
 
         sbi = UDF_SB(sb);
+
+        lock_kernel();
+
         if (sbi->s_vat_inode)
                 iput(sbi->s_vat_inode);
         if (sbi->s_partitions)
@@ -2077,6 +2080,8 @@ static void udf_put_super(struct super_block *sb)
         kfree(sbi->s_partmaps);
         kfree(sb->s_fs_info);
         sb->s_fs_info = NULL;
+
+        unlock_kernel();
 }
 
 static int udf_sync_fs(struct super_block *sb, int wait)
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 74afb9fbf58..2b4d2b6234d 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -594,6 +594,9 @@ static void ufs_put_super_internal(struct super_block *sb)
 
         
         UFSD("ENTER\n");
+
+        lock_kernel();
+
         ufs_put_cstotal(sb);
         size = uspi->s_cssize;
         blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
@@ -621,6 +624,9 @@ static void ufs_put_super_internal(struct super_block *sb)
                 brelse (sbi->s_ucg[i]);
         kfree (sbi->s_ucg);
         kfree (base);
+
+        unlock_kernel();
+
         UFSD("EXIT\n");
 }