diff --git a/buildscripts/deadcode.go b/buildscripts/deadcode.go
index 76327a33e..479589413 100644
--- a/buildscripts/deadcode.go
+++ b/buildscripts/deadcode.go
@@ -118,15 +118,19 @@ func doPackage(fs *token.FileSet, pkg *ast.Package) {
 					}
 				}
 			case *ast.FuncDecl:
-				// Skip if function is 'main'
+				// if function is 'main', never check
 				if n.Name.Name == "main" {
 					continue
 				}
-				// Skip non-exported functions
+				// Do not be strict on non-exported functions
 				if !ast.IsExported(n.Name.Name) {
 					continue
 				}
-				// Check if comments are missing from exported functions
+				// Do not be strict for field list functions
+				// if n.Recv != nil {
+				// continue
+				//}
+				// Be strict for global functions
 				_, ok := cmap[n]
 				if ok == false {
 					p.missingcomments[n.Name.Name] = n
diff --git a/pkg/storage/fs/fs.go b/pkg/storage/fs/fs.go
index 892b1aa44..5b7c5e526 100644
--- a/pkg/storage/fs/fs.go
+++ b/pkg/storage/fs/fs.go
@@ -58,6 +58,15 @@ func start(ctrlChannel <-chan string, errorChannel chan<- error, s *storage) {
 	close(errorChannel)
 }
 
+func appendUniq(slice []string, i string) []string {
+	for _, ele := range slice {
+		if ele == i {
+			return slice
+		}
+	}
+	return append(slice, i)
+}
+
 // Bucket Operations
 func (storage *storage) ListBuckets() ([]mstorage.BucketMetadata, error) {
 	files, err := ioutil.ReadDir(storage.root)
@@ -379,7 +388,7 @@ func (storage *storage) ListObjects(bucket string, resources mstorage.BucketReso
 				}
 				metadataList = append(metadataList, metadata)
 			case delimited != "":
-				resources.CommonPrefixes = helpers.AppendUniqStr(resources.CommonPrefixes, delimited)
+				resources.CommonPrefixes = helpers.appendUniq(resources.CommonPrefixes, delimited)
 			}
 		case resources.Delimiter != "" && strings.HasPrefix(name, resources.Prefix):
 			delimited := delimiter(name, resources.Delimiter)
diff --git a/pkg/storage/inmemory/inmemory.go b/pkg/storage/inmemory/inmemory.go
index 69cad2ef4..f30a6bbd8 100644
--- a/pkg/storage/inmemory/inmemory.go
+++ b/pkg/storage/inmemory/inmemory.go
@@ -47,6 +47,23 @@ type storedObject struct {
 	data     []byte
 }
 
+// Start inmemory object server
+func Start() (chan<- string, <-chan error, *storage) {
+	ctrlChannel := make(chan string)
+	errorChannel := make(chan error)
+	go start(ctrlChannel, errorChannel)
+	return ctrlChannel, errorChannel, &storage{
+		bucketdata: make(map[string]storedBucket),
+		objectdata: make(map[string]storedObject),
+		lock:       new(sync.RWMutex),
+	}
+}
+
+func start(ctrlChannel <-chan string, errorChannel chan<- error) {
+	close(errorChannel)
+}
+
+// GET object from memory buffer
 func (storage *storage) CopyObjectToWriter(w io.Writer, bucket string, object string) (int64, error) {
 	// TODO synchronize access
 	// get object
@@ -60,14 +77,17 @@ func (storage *storage) CopyObjectToWriter(w io.Writer, bucket string, object st
 	}
 }
 
+// Not implemented
 func (storage *storage) StoreBucketPolicy(bucket string, policy interface{}) error {
 	return mstorage.ApiNotImplemented{Api: "PutBucketPolicy"}
 }
 
+// Not implemented
 func (storage *storage) GetBucketPolicy(bucket string) (interface{}, error) {
 	return policy.BucketPolicy{}, mstorage.ApiNotImplemented{Api: "GetBucketPolicy"}
 }
 
+// PUT object to memory buffer
 func (storage *storage) StoreObject(bucket, key, contentType string, data io.Reader) error {
 	storage.lock.Lock()
 	defer storage.lock.Unlock()
@@ -108,6 +128,7 @@ func (storage *storage) StoreObject(bucket, key, contentType string, data io.Rea
 	return nil
 }
 
+// Create Bucket in memory
 func (storage *storage) StoreBucket(bucketName string) error {
 	storage.lock.Lock()
 	defer storage.lock.Unlock()
@@ -128,11 +149,11 @@ func (storage *storage) StoreBucket(bucketName string) error {
 	return nil
 }
 
+// List objects in memory
 func (storage *storage) ListObjects(bucket string, resources mstorage.BucketResourcesMetadata) ([]mstorage.ObjectMetadata, mstorage.BucketResourcesMetadata, error) {
 	if _, ok := storage.bucketdata[bucket]; ok == false {
 		return []mstorage.ObjectMetadata{}, mstorage.BucketResourcesMetadata{IsTruncated: false}, mstorage.BucketNotFound{Bucket: bucket}
 	}
-	// TODO prefix and count handling
 	var results []mstorage.ObjectMetadata
 	var keys []string
 	for key := range storage.objectdata {
@@ -157,10 +178,16 @@ func (storage *storage) ListObjects(bucket string, resources mstorage.BucketReso
 
 type ByBucketName []mstorage.BucketMetadata
 
-func (b ByBucketName) Len() int           { return len(b) }
-func (b ByBucketName) Swap(i, j int)      { b[i], b[j] = b[j], b[i] }
+// Len of bucket name
+func (b ByBucketName) Len() int { return len(b) }
+
+// Swap bucket i, j
+func (b ByBucketName) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
+
+// Less
 func (b ByBucketName) Less(i, j int) bool { return b[i].Name < b[j].Name }
 
+// List buckets
 func (storage *storage) ListBuckets() ([]mstorage.BucketMetadata, error) {
 	var results []mstorage.BucketMetadata
 	for _, bucket := range storage.bucketdata {
@@ -170,21 +197,7 @@ func (storage *storage) ListBuckets() ([]mstorage.BucketMetadata, error) {
 	return results, nil
 }
 
-func Start() (chan<- string, <-chan error, *storage) {
-	ctrlChannel := make(chan string)
-	errorChannel := make(chan error)
-	go start(ctrlChannel, errorChannel)
-	return ctrlChannel, errorChannel, &storage{
-		bucketdata: make(map[string]storedBucket),
-		objectdata: make(map[string]storedObject),
-		lock:       new(sync.RWMutex),
-	}
-}
-
-func start(ctrlChannel <-chan string, errorChannel chan<- error) {
-	close(errorChannel)
-}
-
+// HEAD object
 func (storage *storage) GetObjectMetadata(bucket, key string) (mstorage.ObjectMetadata, error) {
 	objectKey := bucket + ":" + key
 
diff --git a/pkg/utils/config/config_test.go b/pkg/utils/config/config_test.go
index 71684fe1d..9513ce094 100644
--- a/pkg/utils/config/config_test.go
+++ b/pkg/utils/config/config_test.go
@@ -23,7 +23,6 @@ import (
 	"testing"
 
 	"github.com/minio-io/minio/pkg/utils/crypto/keys"
-	"github.com/minio-io/minio/pkg/utils/helpers"
 	. "gopkg.in/check.v1"
 )
 
@@ -35,7 +34,7 @@ func Test(t *testing.T) { TestingT(t) }
 
 func (s *MySuite) TestConfig(c *C) {
 	conf := Config{}
-	conf.configPath, _ = helpers.MakeTempTestDir()
+	conf.configPath, _ = ioutil.TempDir("/tmp", "minio-test-")
 	defer os.RemoveAll(conf.configPath)
 	conf.configFile = path.Join(conf.configPath, "config.json")
 	if _, err := os.Stat(conf.configFile); os.IsNotExist(err) {
diff --git a/pkg/utils/cpu/cpu.go b/pkg/utils/cpu/cpu.go
index 8d552bfaa..eb3c58d99 100644
--- a/pkg/utils/cpu/cpu.go
+++ b/pkg/utils/cpu/cpu.go
@@ -21,14 +21,17 @@ package cpu
 // int has_avx2 (void);
 import "C"
 
+// CPUID instruction verification wrapper for SSE41 extensions
 func HasSSE41() bool {
 	return int(C.has_sse41()) == 1
 }
 
+// CPUID instruction verification wrapper for AVX extensions
 func HasAVX() bool {
 	return int(C.has_avx()) == 1
 }
 
+// CPUID instruction verification wrapper for AVX2 extensions
 func HasAVX2() bool {
 	return int(C.has_avx2()) == 1
 }
diff --git a/pkg/utils/crypto/sha512/sha512.go b/pkg/utils/crypto/sha512/sha512.go
index 24d37f603..691826c56 100644
--- a/pkg/utils/crypto/sha512/sha512.go
+++ b/pkg/utils/crypto/sha512/sha512.go
@@ -55,6 +55,7 @@ func block(dig *digest, p []byte) {
 	}
 }
 
+// Reset digest to its default value
 func (d *digest) Reset() {
 	d.h[0] = init0
 	d.h[1] = init1
@@ -75,12 +76,13 @@ func New() hash.Hash {
 	return d
 }
 
-func (d *digest) Size() int {
-	return Size
-}
+// Return output array byte size
+func (d *digest) Size() int { return Size }
 
+// Return blockSize
 func (d *digest) BlockSize() int { return BlockSize }
 
+// Write blocks
 func (d *digest) Write(p []byte) (nn int, err error) {
 	nn = len(p)
 	d.len += uint64(nn)
@@ -104,6 +106,7 @@ func (d *digest) Write(p []byte) (nn int, err error) {
 	return
 }
 
+// Calculate sha512
 func (d0 *digest) Sum(in []byte) []byte {
 	// Make a copy of d0 so that caller can keep writing and summing.
 	d := new(digest)
@@ -112,6 +115,7 @@ func (d0 *digest) Sum(in []byte) []byte {
 	return append(in, hash[:]...)
 }
 
+// internal checksum calculation, returns [Size]byte
 func (d *digest) checkSum() [Size]byte {
 	// Padding.  Add a 1 bit and 0 bits until 112 bytes mod 128.
 	len := d.len
@@ -153,6 +157,7 @@ func (d *digest) checkSum() [Size]byte {
 
 // Convenience functions
 
+// Single caller function returns [Size]byte
 func Sum512(data []byte) [Size]byte {
 	var d digest
 	d.Reset()
@@ -160,6 +165,7 @@ func Sum512(data []byte) [Size]byte {
 	return d.checkSum()
 }
 
+// Takes in io.Reader, low memory footprint checksum
 func Sum(reader io.Reader) ([]byte, error) {
 	h := New()
 	var err error
@@ -176,6 +182,7 @@ func Sum(reader io.Reader) ([]byte, error) {
 	return h.Sum(nil), nil
 }
 
+// Similar to 'Sum()' but returns a [Size]byte
 func SumStream(reader io.Reader) ([Size]byte, error) {
 	var returnValue [Size]byte
 	sumSlice, err := Sum(reader)
diff --git a/pkg/utils/crypto/sha512/sha512_gen.go b/pkg/utils/crypto/sha512/sha512_gen.go
index 9641e19f0..e6fd8a424 100644
--- a/pkg/utils/crypto/sha512/sha512_gen.go
+++ b/pkg/utils/crypto/sha512/sha512_gen.go
@@ -29,6 +29,7 @@ import (
 	sha512intel "github.com/minio-io/minio/pkg/utils/crypto/sha512"
 )
 
+// Intels processor accelerated sha512 implementation
 func SumIntel(reader io.Reader) ([]byte, error) {
 	h := sha512intel.New()
 	var err error
@@ -45,6 +46,7 @@ func SumIntel(reader io.Reader) ([]byte, error) {
 	return h.Sum(nil), nil
 }
 
+// Golang default implementation
 func Sum(reader io.Reader) ([]byte, error) {
 	k := sha512.New()
 	var err error
diff --git a/pkg/utils/crypto/x509/generator.go b/pkg/utils/crypto/x509/generator.go
index 6219e346c..650135b3f 100644
--- a/pkg/utils/crypto/x509/generator.go
+++ b/pkg/utils/crypto/x509/generator.go
@@ -72,6 +72,7 @@ func pemBlockForKey(priv interface{}) *pem.Block {
 	}
 }
 
+// Generate certificates using custom parameters
 func (tls *Certificates) GenerateCertificates(params X509Params) error {
 	var rsaBits int = 2048
 	var priv interface{}
diff --git a/pkg/utils/helpers/common.go b/pkg/utils/helpers/common.go
deleted file mode 100644
index 242f55df0..000000000
--- a/pkg/utils/helpers/common.go
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Mini Object Storage, (C) 2014 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package helpers
-
-import (
-	"io/ioutil"
-	"strings"
-)
-
-// Create a new temp directory
-func MakeTempTestDir() (string, error) {
-	return ioutil.TempDir("/tmp", "minio-test-")
-}
-
-// Camelcase input string
-func FirstUpper(str string) string {
-	return strings.ToUpper(str[0:1]) + str[1:]
-}
-
-func AppendUniqInt(slice []int, i int) []int {
-	for _, ele := range slice {
-		if ele == i {
-			return slice
-		}
-	}
-	return append(slice, i)
-}
-
-func AppendUniqStr(slice []string, i string) []string {
-	for _, ele := range slice {
-		if ele == i {
-			return slice
-		}
-	}
-	return append(slice, i)
-}
diff --git a/pkg/utils/policy/date.go b/pkg/utils/policy/date.go
index b22e8207a..7fe6f04bb 100644
--- a/pkg/utils/policy/date.go
+++ b/pkg/utils/policy/date.go
@@ -13,6 +13,7 @@ type Date struct {
 	Day   byte
 }
 
+// Date to string output in yyyy-mm-dd format
 func (d Date) String() string {
 	return fmt.Sprintf("%04d-%02d-%02d", d.Year, d.Month, d.Day)
 }