btrfs: Fix typos in comments and strings

The typos accumulate over time so once in a while time they get fixed in
a large patch.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 1a4e2b1..a62e1e8 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -27,10 +27,10 @@
  *
  * @type:	leaf or node
  * @identifier:	the necessary info to locate the leaf/node.
- * 		It's recommened to decode key.objecitd/offset if it's
+ * 		It's recommended to decode key.objecitd/offset if it's
  * 		meaningful.
  * @reason:	describe the error
- * @bad_value:	optional, it's recommened to output bad value and its
+ * @bad_value:	optional, it's recommended to output bad value and its
  *		expected value (range).
  *
  * Since comma is used to separate the components, only space is allowed
@@ -130,7 +130,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 	}
 
 	/*
-	 * Support for new compression/encrption must introduce incompat flag,
+	 * Support for new compression/encryption must introduce incompat flag,
 	 * and must be caught in open_ctree().
 	 */
 	if (btrfs_file_extent_compression(leaf, fi) > BTRFS_COMPRESS_TYPES) {