btrfs: delete duplicated words + other fixes in comments

Delete repeated words in fs/btrfs/.
{to, the, a, and old}
and change "into 2 part" to "into 2 parts".

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/block-group.c

@@ -2785,7 +2785,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans)
 			 * finished yet (no block group item in the extent tree
 			 * yet, etc). If this is the case, wait for all free
 			 * space endio workers to finish and retry. This is a
-			 * a very rare case so no need for a more efficient and
+			 * very rare case so no need for a more efficient and
 			 * complex approach.
 			 */
 			if (ret == -ENOENT) {

fs/btrfs/ctree.c

@@ -5115,7 +5115,7 @@ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
 			slot--;
 		/*
 		 * check this node pointer against the min_trans parameters.
-		 * If it is too old, old, skip to the next one.
+		 * If it is too old, skip to the next one.
 		 */
 		while (slot < nritems) {
 			u64 gen;

fs/btrfs/disk-io.c

@@ -2928,7 +2928,7 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
 	}
 
 	/*
-	 * Verify the type first, if that or the the checksum value are
+	 * Verify the type first, if that or the checksum value are
 	 * corrupted, we'll find out
 	 */
 	csum_type = btrfs_super_csum_type(disk_super);

fs/btrfs/extent_io.c

@@ -3241,7 +3241,7 @@ static int __do_readpage(struct page *page,
 
 		/*
 		 * If we have a file range that points to a compressed extent
-		 * and it's followed by a consecutive file range that points to
+		 * and it's followed by a consecutive file range that points
 		 * to the same compressed extent (possibly with a different
 		 * offset and/or length, so it either points to the whole extent
 		 * or only part of it), we must make sure we do not submit a

fs/btrfs/free-space-cache.c

@@ -1353,7 +1353,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 
 	/*
 	 * at this point the pages are under IO and we're happy,
-	 * The caller is responsible for waiting on them and updating the
+	 * The caller is responsible for waiting on them and updating
 	 * the cache and the inode
 	 */
 	io_ctl->entries = entries;

fs/btrfs/qgroup.c

@@ -2315,7 +2315,7 @@ static int qgroup_update_refcnt(struct btrfs_fs_info *fs_info,
  * Update qgroup rfer/excl counters.
  * Rfer update is easy, codes can explain themselves.
  *
- * Excl update is tricky, the update is split into 2 part.
+ * Excl update is tricky, the update is split into 2 parts.
  * Part 1: Possible exclusive <-> sharing detect:
  *	|	A	|	!A	|
  *  -------------------------------------

fs/btrfs/tree-log.c

@@ -4883,7 +4883,7 @@ static int log_conflicting_inodes(struct btrfs_trans_handle *trans,
 		 * Check the inode's logged_trans only instead of
 		 * btrfs_inode_in_log(). This is because the last_log_commit of
 		 * the inode is not updated when we only log that it exists and
-		 * and it has the full sync bit set (see btrfs_log_inode()).
+		 * it has the full sync bit set (see btrfs_log_inode()).
 		 */
 		if (BTRFS_I(inode)->logged_trans == trans->transid) {
 			spin_unlock(&BTRFS_I(inode)->lock);
@@ -6380,7 +6380,7 @@ void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  *            committed by the caller, and BTRFS_DONT_NEED_TRANS_COMMIT
  *            otherwise.
  * When false: returns BTRFS_DONT_NEED_LOG_SYNC if the caller does not need to
- *             to sync the log, BTRFS_NEED_LOG_SYNC if it needs to sync the log,
+ *             sync the log, BTRFS_NEED_LOG_SYNC if it needs to sync the log,
  *             or BTRFS_NEED_TRANS_COMMIT if the transaction needs to be
  *             committed (without attempting to sync the log).
  */