From 8abebe3eadb35222a1147078da4010b4cbfe5858 Mon Sep 17 00:00:00 2001
From: Graeme Russ <graeme.russ@gmail.com>
Date: Tue, 27 Nov 2012 15:38:38 +0000
Subject: [PATCH] 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>
---
arch/x86/include/asm/bitops.h | 5 +++++
1 file changed, 5 insertions(+)
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
--
2.39.5