---

yaml
---
r: 24159
b: refs/heads/master
c: c1226a0
h: refs/heads/master
i:
  24157: 152db45
  24155: fac82d0
  24151: 693276e
  24143: aac466f
  24127: 3995140
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4117b02132d1cf96a3e1c57148e302c4801c974d
+refs/heads/master: c1226a005ec400e966f4993dfcc0e99fd7baa6a1

trunk/include/asm-generic/bitops/__ffs.h

@@ -0,0 +1,43 @@
+#ifndef _ASM_GENERIC_BITOPS___FFS_H_
+#define _ASM_GENERIC_BITOPS___FFS_H_
+
+#include <asm/types.h>
+
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static inline unsigned long __ffs(unsigned long word)
+{
+	int num = 0;
+
+#if BITS_PER_LONG == 64
+	if ((word & 0xffffffff) == 0) {
+		num += 32;
+		word >>= 32;
+	}
+#endif
+	if ((word & 0xffff) == 0) {
+		num += 16;
+		word >>= 16;
+	}
+	if ((word & 0xff) == 0) {
+		num += 8;
+		word >>= 8;
+	}
+	if ((word & 0xf) == 0) {
+		num += 4;
+		word >>= 4;
+	}
+	if ((word & 0x3) == 0) {
+		num += 2;
+		word >>= 2;
+	}
+	if ((word & 0x1) == 0)
+		num += 1;
+	return num;
+}
+
+#endif /* _ASM_GENERIC_BITOPS___FFS_H_ */