ext4: fix trailing whitespace

Made suggested modifications from checkpatch in reference to ERROR:
 trailing whitespace
Signed-off-by: Jack Qiu <jack.qiu@huawei.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20210409042035.15516-1-jack.qiu@huawei.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/balloc.c

@@ -239,7 +239,7 @@ unsigned ext4_free_clusters_after_init(struct super_block *sb,
 				       ext4_group_t block_group,
 				       struct ext4_group_desc *gdp)
 {
-	return num_clusters_in_group(sb, block_group) - 
+	return num_clusters_in_group(sb, block_group) -
 		ext4_num_overhead_clusters(sb, block_group, gdp);
 }
 

fs/ext4/mballoc.c

@@ -3089,7 +3089,7 @@ int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
 	sbi->s_group_info_size = size / sizeof(*sbi->s_group_info);
 	if (old_groupinfo)
 		ext4_kvfree_array_rcu(old_groupinfo);
-	ext4_debug("allocated s_groupinfo array for %d meta_bg's\n", 
+	ext4_debug("allocated s_groupinfo array for %d meta_bg's\n",
 		   sbi->s_group_info_size);
 	return 0;
 }

fs/ext4/namei.c

@@ -2234,10 +2234,10 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
 
 	retval = ext4_handle_dirty_dx_node(handle, dir, frame->bh);
 	if (retval)
-		goto out_frames;	
+		goto out_frames;
 	retval = ext4_handle_dirty_dirblock(handle, dir, bh2);
 	if (retval)
-		goto out_frames;	
+		goto out_frames;
 
 	de = do_split(handle,dir, &bh2, frame, &fname->hinfo);
 	if (IS_ERR(de)) {
@@ -3469,7 +3469,7 @@ static int ext4_symlink(struct user_namespace *mnt_userns, struct inode *dir,
 		 * for transaction commit if we are running out of space
 		 * and thus we deadlock. So we have to stop transaction now
 		 * and restart it when symlink contents is written.
-		 * 
+		 *
 		 * To keep fs consistent in case of crash, we have to put inode
 		 * to orphan list in the mean time.
 		 */

fs/ext4/super.c

@@ -5020,7 +5020,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 			ext4_journal_commit_callback;
 
 	block = ext4_count_free_clusters(sb);
-	ext4_free_blocks_count_set(sbi->s_es, 
+	ext4_free_blocks_count_set(sbi->s_es,
 				   EXT4_C2B(sbi, block));
 	err = percpu_counter_init(&sbi->s_freeclusters_counter, block,
 				  GFP_KERNEL);