1 files changed, 23 insertions, 4 deletions

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index d9b0e92b3602..09b1b6ee2186 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -32,6 +32,7 @@
 #include <linux/crc32.h>
 #include <asm/uaccess.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
@@ -183,6 +184,9 @@ 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 +199,8 @@ static void jfs_put_super(struct super_block *sb)
         sbi->direct_inode = NULL;
 
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 enum {
@@ -370,19 +376,24 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
         s64 newLVSize = 0;
         int rc = 0;
         int flag = JFS_SBI(sb)->flag;
+        int ret;
 
         if (!parse_options(data, sb, &newLVSize, &flag)) {
                 return -EINVAL;
         }
+        lock_kernel();
         if (newLVSize) {
                 if (sb->s_flags & MS_RDONLY) {
                         printk(KERN_ERR
                   "JFS: resize requires volume to be mounted read-write\n");
+                        unlock_kernel();
                         return -EROFS;
                 }
                 rc = jfs_extendfs(sb, newLVSize, 0);
-                if (rc)
+                if (rc) {
+                        unlock_kernel();
                         return rc;
+                }
         }
 
         if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
@@ -393,23 +404,31 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
                 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
 
                 JFS_SBI(sb)->flag = flag;
-                return jfs_mount_rw(sb, 1);
+                ret = jfs_mount_rw(sb, 1);
+                unlock_kernel();
+                return ret;
         }
         if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
                 rc = jfs_umount_rw(sb);
                 JFS_SBI(sb)->flag = flag;
+                unlock_kernel();
                 return rc;
         }
         if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
                 if (!(sb->s_flags & MS_RDONLY)) {
                         rc = jfs_umount_rw(sb);
-                        if (rc)
+                        if (rc) {
+                                unlock_kernel();
                                 return rc;
+                        }
                         JFS_SBI(sb)->flag = flag;
-                        return jfs_mount_rw(sb, 1);
+                        ret = jfs_mount_rw(sb, 1);
+                        unlock_kernel();
+                        return ret;
                 }
         JFS_SBI(sb)->flag = flag;
 
+        unlock_kernel();
         return 0;
 }