mn10300: define __fls
authorRusty Russell <rusty@rustcorp.com.au>
Sat, 3 Jan 2009 05:49:03 +0000 (16:19 +1030)
committerRusty Russell <rusty@rustcorp.com.au>
Sat, 3 Jan 2009 05:49:03 +0000 (16:19 +1030)
Like fls, but can't be handed 0 and returns the bit number.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
include/asm-mn10300/bitops.h

index cc6d40c..0b610f4 100644 (file)
@@ -196,6 +196,17 @@ int fls(int x)
 }
 
 /**
+ * __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
  *