}
#endif
+/*
+ * Determine whether some value is a power of two, where zero is
+ * *not* considered a power of two.
+ */
+
+static inline __attribute__((const))
+bool is_power_of_2(unsigned long n)
+{
+ return (n != 0 && ((n & (n - 1)) == 0));
+}
+
/*
* round up to nearest power of two
*/
* roundup_pow_of_two - round the given value up to nearest power of two
* @n - parameter
*
- * round the given balue up to the nearest power of two
+ * round the given value up to the nearest power of two
* - the result is undefined when n == 0
* - this can be used to initialise global variables from constant data
*/