From: Graeme Russ <graeme.russ@gmail.com>
Date: Tue, 27 Nov 2012 15:38:38 +0000 (+0000)
Subject: x86: Add ilog2 to bitops
X-Git-Tag: v2013.01-rc2~103^2~9
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=commitdiff_plain;h=8abebe3eadb35222a1147078da4010b4cbfe5858

x86: Add ilog2 to bitops

ilog2 is required by AHCI driver

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index c7a38f237a..5a7e4cba2b 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -351,6 +351,11 @@ static __inline__ int ffs(int x)
 }
 #define PLATFORM_FFS
 
+static inline int __ilog2(unsigned int x)
+{
+	return generic_fls(x) - 1;
+}
+
 /**
  * hweightN - returns the hamming weight of a N-bit word
  * @x: the word to weigh