Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block: (43 commits)
  block: ensure that completion error gets properly traced
  blktrace: add missing probe argument to block_bio_complete
  block cfq: don't use atomic_t for cfq_group
  block cfq: don't use atomic_t for cfq_queue
  block: trace event block fix unassigned field
  block: add internal hd part table references
  block: fix accounting bug on cross partition merges
  kref: add kref_test_and_get
  bio-integrity: mark kintegrityd_wq highpri and CPU intensive
  block: make kblockd_workqueue smarter
  Revert "sd: implement sd_check_events()"
  block: Clean up exit_io_context() source code.
  Fix compile warnings due to missing removal of a 'ret' variable
  fs/block: type signature of major_to_index(int) to major_to_index(unsigned)
  block: convert !IS_ERR(p) && p to !IS_ERR_NOR_NULL(p)
  cfq-iosched: don't check cfqg in choose_service_tree()
  fs/splice: Pull buf->ops->confirm() from splice_from_pipe actors
  cdrom: export cdrom_check_events()
  sd: implement sd_check_events()
  sr: implement sr_check_events()
  ...

1 files changed, 10 insertions, 9 deletions

diff --git a/fs/super.c b/fs/super.c
index 823e061faa87..4f6a3571a634 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -767,13 +767,13 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 {
         struct block_device *bdev;
         struct super_block *s;
-        fmode_t mode = FMODE_READ;
+        fmode_t mode = FMODE_READ | FMODE_EXCL;
         int error = 0;
 
         if (!(flags & MS_RDONLY))
                 mode |= FMODE_WRITE;
 
-        bdev = open_bdev_exclusive(dev_name, mode, fs_type);
+        bdev = blkdev_get_by_path(dev_name, mode, fs_type);
         if (IS_ERR(bdev))
                 return ERR_CAST(bdev);
 
@@ -802,13 +802,13 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 
                 /*
                  * s_umount nests inside bd_mutex during
-                 * __invalidate_device().  close_bdev_exclusive()
-                 * acquires bd_mutex and can't be called under
-                 * s_umount.  Drop s_umount temporarily.  This is safe
-                 * as we're holding an active reference.
+                 * __invalidate_device().  blkdev_put() acquires
+                 * bd_mutex and can't be called under s_umount.  Drop
+                 * s_umount temporarily.  This is safe as we're
+                 * holding an active reference.
                  */
                 up_write(&s->s_umount);
-                close_bdev_exclusive(bdev, mode);
+                blkdev_put(bdev, mode);
                 down_write(&s->s_umount);
         } else {
                 char b[BDEVNAME_SIZE];
@@ -832,7 +832,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
 error_s:
         error = PTR_ERR(s);
 error_bdev:
-        close_bdev_exclusive(bdev, mode);
+        blkdev_put(bdev, mode);
 error:
         return ERR_PTR(error);
 }
@@ -863,7 +863,8 @@ void kill_block_super(struct super_block *sb)
         bdev->bd_super = NULL;
         generic_shutdown_super(sb);
         sync_blockdev(bdev);
-        close_bdev_exclusive(bdev, mode);
+        WARN_ON_ONCE(!(mode & FMODE_EXCL));
+        blkdev_put(bdev, mode | FMODE_EXCL);
 }
 
 EXPORT_SYMBOL(kill_block_super);