+/**
+ * Searches the input parameter for the least significant set bit
+ * (starting from zero). Safe version (checks for input parameter being zero).
+ *
+ * @warning ``pos`` must be a valid pointer. It is not checked!
+ *
+ * @param v
+ * The input parameter.
+ * @param pos
+ * If ``v`` was not 0, this value will contain position of least significant
+ * bit within the input parameter.
+ * @return
+ * Returns 0 if ``v`` was 0, otherwise returns 1.
+ */
+static inline int
+rte_bsf64_safe(uint64_t v, uint32_t *pos)
+{
+ if (v == 0)
+ return 0;
+
+ *pos = __builtin_ctzll(v);
+ return 1;
+}