Like fls, but can't be handed 0 and returns the bit number.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
return (x != 0) ? __ilog2_u32(x) + 1 : 0;
}
+/**
+ * __fls - find last (most-significant) set bit in a long word
+ * @word: the word to search
+ *
+ * Undefined if no set bit exists, so code should check against 0 first.
+ */
+static inline unsigned long __fls(unsigned long word)
+{
+ return __ilog2_u32(word);
+}
+
/**
* ffs - find first bit set
* @x: the word to search