Btrfs: cleanup warnings from gcc 4.6 (nonbugs)

These are all the cases where a variable is set, but not read which are
not bugs as far as I can see, but simply leftovers.

Still needs more review.

Found by gcc 4.6's new warnings

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d7fb2733d028..0002e6d1a16f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -61,6 +61,8 @@ static void btrfs_put_super(struct super_block *sb)
 
         ret = close_ctree(root);
         sb->s_fs_info = NULL;
+
+        (void)ret; /* FIXME: need to fix VFS to return error? */
 }
 
 enum {
@@ -445,7 +447,6 @@ static int btrfs_fill_super(struct super_block *sb,
 {
         struct inode *inode;
         struct dentry *root_dentry;
-        struct btrfs_super_block *disk_super;
         struct btrfs_root *tree_root;
         struct btrfs_key key;
         int err;
@@ -467,7 +468,6 @@ static int btrfs_fill_super(struct super_block *sb,
                 return PTR_ERR(tree_root);
         }
         sb->s_fs_info = tree_root;
-        disk_super = &tree_root->fs_info->super_copy;
 
         key.objectid = BTRFS_FIRST_FREE_OBJECTID;
         key.type = BTRFS_INODE_ITEM_KEY;
@@ -580,7 +580,6 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
         char *subvol_name = NULL;
         u64 subvol_objectid = 0;
         int error = 0;
-        int found = 0;
 
         if (!(flags & MS_RDONLY))
                 mode |= FMODE_WRITE;
@@ -616,7 +615,6 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
                         goto error_close_devices;
                 }
 
-                found = 1;
                 btrfs_close_devices(fs_devices);
         } else {
                 char b[BDEVNAME_SIZE];