xfs: only issues a cache flush on unmount if barriers are enabled

[safe/jmp/linux-2.6] / fs / super.c

diff --git a/fs/super.c b/fs/super.c
index cb20744..645e540 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -458,7 +458,6 @@ void sync_filesystems(int wait)
                if (sb->s_flags & MS_RDONLY)
                        continue;
                sb->s_need_sync_fs = 1;
-               async_synchronize_full_special(&sb->s_async_list);
        }
 
 restart:
@@ -471,6 +470,7 @@ restart:
                sb->s_count++;
                spin_unlock(&sb_lock);
                down_read(&sb->s_umount);
+               async_synchronize_full_special(&sb->s_async_list);
                if (sb->s_root && (wait || sb->s_dirt))
                        sb->s_op->sync_fs(sb, wait);
                up_read(&sb->s_umount);
@@ -544,7 +544,7 @@ rescan:
        return NULL;
 }
 
-asmlinkage long sys_ustat(unsigned dev, struct ustat __user * ubuf)
+SYSCALL_DEFINE2(ustat, unsigned, dev, struct ustat __user *, ubuf)
 {
         struct super_block *s;
         struct ustat tmp;
@@ -810,6 +810,7 @@ int get_sb_bdev(struct file_system_type *fs_type,
                }
 
                s->s_flags |= MS_ACTIVE;
+               bdev->bd_super = s;
        }
 
        return simple_set_mnt(mnt, s);
@@ -829,6 +830,7 @@ void kill_block_super(struct super_block *sb)
        struct block_device *bdev = sb->s_bdev;
        fmode_t mode = sb->s_mode;
 
+       bdev->bd_super = 0;
        generic_shutdown_super(sb);
        sync_blockdev(bdev);
        close_bdev_exclusive(bdev, mode);