Merge branch 'master' into ip-forwarding

- Merges aleksej-paschenko's with HEAD
- Adds vfs2 support for ip_forward

1 files changed, 8 insertions, 0 deletions

diff --git a/pkg/bits/bits_template.go b/pkg/bits/bits_template.go
index 93a435b80..998645388 100644
--- a/pkg/bits/bits_template.go
+++ b/pkg/bits/bits_template.go
@@ -42,3 +42,11 @@ func Mask(is ...int) T {
 func MaskOf(i int) T {
 	return T(1) << T(i)
 }
+
+// IsPowerOfTwo returns true if v is power of 2.
+func IsPowerOfTwo(v T) bool {
+	if v == 0 {
+		return false
+	}
+	return v&(v-1) == 0
+}