diff --git a/balloc.c b/balloc.c
index 30c2414d859c..21a865e0ac60 100644
--- a/balloc.c
+++ b/balloc.c
@@ -75,8 +75,12 @@ static int exfat_allocate_bitmap(struct super_block *sb,
 	}
 	sbi->map_sectors = ((need_map_size - 1) >>
 			(sb->s_blocksize_bits)) + 1;
-	sbi->vol_amap = kmalloc_array(sbi->map_sectors,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
+	sbi->vol_amap = kvmalloc_array(sbi->map_sectors,
 				sizeof(struct buffer_head *), GFP_KERNEL);
+#else
+	sbi->vol_amap = vmalloc(sbi->map_sectors * sizeof(struct buffer_head *));
+#endif
 	if (!sbi->vol_amap)
 		return -ENOMEM;
 
@@ -90,7 +94,7 @@ static int exfat_allocate_bitmap(struct super_block *sb,
 			while (j < i)
 				brelse(sbi->vol_amap[j++]);
 
-			kfree(sbi->vol_amap);
+			kvfree(sbi->vol_amap);
 			sbi->vol_amap = NULL;
 			return -EIO;
 		}
@@ -144,7 +148,7 @@ void exfat_free_bitmap(struct exfat_sb_info *sbi)
 	for (i = 0; i < sbi->map_sectors; i++)
 		__brelse(sbi->vol_amap[i]);
 
-	kfree(sbi->vol_amap);
+	kvfree(sbi->vol_amap);
 }
 
 int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync)