diff --git a/internal/cryptocore/gcm_go1.4.go b/internal/cryptocore/gcm_go1.4.go
index 6b494d7..c1aa488 100644
--- a/internal/cryptocore/gcm_go1.4.go
+++ b/internal/cryptocore/gcm_go1.4.go
@@ -11,6 +11,7 @@ import (
 )
 
 const (
+	// HaveModernGoGCM indicates if Go GCM supports 128-bit nonces
 	HaveModernGoGCM = false
 )
 
diff --git a/internal/cryptocore/gcm_go1.5.go b/internal/cryptocore/gcm_go1.5.go
index 6e67d21..3c38357 100644
--- a/internal/cryptocore/gcm_go1.5.go
+++ b/internal/cryptocore/gcm_go1.5.go
@@ -8,6 +8,7 @@ import (
 )
 
 const (
+	// HaveModernGoGCM indicates if Go GCM supports 128-bit nonces
 	HaveModernGoGCM = true
 )
 
diff --git a/internal/stupidgcm/stupidgcm.go b/internal/stupidgcm/stupidgcm.go
index 58027f8..6e551f5 100644
--- a/internal/stupidgcm/stupidgcm.go
+++ b/internal/stupidgcm/stupidgcm.go
@@ -16,7 +16,7 @@ import (
 )
 
 const (
-	// Has openssl been disabled at compile-time?
+	// BuiltWithoutOpenssl indicates if openssl been disabled at compile-time
 	BuiltWithoutOpenssl = false
 
 	keyLen = 32
diff --git a/internal/stupidgcm/without_openssl.go b/internal/stupidgcm/without_openssl.go
index 0b3cf90..91dd33c 100644
--- a/internal/stupidgcm/without_openssl.go
+++ b/internal/stupidgcm/without_openssl.go
@@ -11,7 +11,7 @@ import (
 type stupidGCM struct{}
 
 const (
-	// Has openssl been disabled at compile-time?
+	// BuiltWithoutOpenssl indicates if openssl been disabled at compile-time
 	BuiltWithoutOpenssl = true
 )
 
diff --git a/internal/syscallcompat/sys_linux.go b/internal/syscallcompat/sys_linux.go
index c9f6ee0..93516f3 100644
--- a/internal/syscallcompat/sys_linux.go
+++ b/internal/syscallcompat/sys_linux.go
@@ -8,7 +8,7 @@ import (
 	"github.com/rfjakob/gocryptfs/internal/tlog"
 )
 
-const FALLOC_FL_KEEP_SIZE = 0x01
+const _FALLOC_FL_KEEP_SIZE = 0x01
 
 var preallocWarn sync.Once
 
@@ -17,7 +17,7 @@ var preallocWarn sync.Once
 // ciphertext block (that would corrupt the block).
 func EnospcPrealloc(fd int, off int64, len int64) (err error) {
 	for {
-		err = syscall.Fallocate(fd, FALLOC_FL_KEEP_SIZE, off, len)
+		err = syscall.Fallocate(fd, _FALLOC_FL_KEEP_SIZE, off, len)
 		if err == syscall.EINTR {
 			// fallocate, like many syscalls, can return EINTR. This is not an
 			// error and just signifies that the operation was interrupted by a
diff --git a/internal/tlog/log.go b/internal/tlog/log.go
index 8db3de2..4ab5d79 100644
--- a/internal/tlog/log.go
+++ b/internal/tlog/log.go
@@ -74,15 +74,16 @@ func (l *toggledLogger) Println(v ...interface{}) {
 	}
 }
 
-// Debug messages
+// Debug logs debug messages
 // Can be enabled by passing "-d"
 var Debug *toggledLogger
 
-// Informational message
+// Info logs informational message
 // Can be disabled by passing "-q"
 var Info *toggledLogger
 
-// A warning, meaning nothing serious by itself but might indicate problems.
+// Warn logs warnings,
+// meaning nothing serious by itself but might indicate problems.
 // Passing "-wpanic" will make this function panic after printing the message.
 var Warn *toggledLogger