From f43be7e29b830d39a075d53986f3b85adf286834 Mon Sep 17 00:00:00 2001
From: Alexander van Heukelum <heukelum@mailshack.com>
Date: Sat, 15 Mar 2008 18:30:57 +0100
Subject: [PATCH] --- yaml --- r: 93673 b: refs/heads/master c:
 7d9dff22e8ad06ad330968c9e3d3a2fb55a5f9c3 h: refs/heads/master i:   93671:
 336ce4aee3629785fa3948a7bab9f2129ed0a291 v: v3

---
 [refs]                                   |  2 +-
 trunk/include/asm-generic/bitops/__fls.h | 43 ++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 trunk/include/asm-generic/bitops/__fls.h

diff --git a/[refs] b/[refs]
index 3a439ccee8b6..2d29d78422b9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 12d9c8420b9daa1da3d9e090640fb24bcd0deba2
+refs/heads/master: 7d9dff22e8ad06ad330968c9e3d3a2fb55a5f9c3
diff --git a/trunk/include/asm-generic/bitops/__fls.h b/trunk/include/asm-generic/bitops/__fls.h
new file mode 100644
index 000000000000..be24465403d6
--- /dev/null
+++ b/trunk/include/asm-generic/bitops/__fls.h
@@ -0,0 +1,43 @@
+#ifndef _ASM_GENERIC_BITOPS___FLS_H_
+#define _ASM_GENERIC_BITOPS___FLS_H_
+
+#include <asm/types.h>
+
+/**
+ * __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)
+{
+	int num = BITS_PER_LONG - 1;
+
+#if BITS_PER_LONG == 64
+	if (!(word & (~0ul << 32))) {
+		num -= 32;
+		word <<= 32;
+	}
+#endif
+	if (!(word & (~0ul << (BITS_PER_LONG-16)))) {
+		num -= 16;
+		word <<= 16;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-8)))) {
+		num -= 8;
+		word <<= 8;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-4)))) {
+		num -= 4;
+		word <<= 4;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-2)))) {
+		num -= 2;
+		word <<= 2;
+	}
+	if (!(word & (~0ul << (BITS_PER_LONG-1))))
+		num -= 1;
+	return num;
+}
+
+#endif /* _ASM_GENERIC_BITOPS___FLS_H_ */