linux-kernel - [PATCH 1/1] avr32: define _

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Message-Id: <200812041019.21926.rusty@rustcorp.com.au>
Date:	Thu, 4 Dec 2008 10:19:21 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Haavard Skinnemoen <hskinnemoen@...el.com>
Cc:	linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCH 1/1] avr32: define __fls

Like fls, but can't be handed 0 and returns the bit number.

(I added find_last_bit() to bitmap.h which broke archs which didn't
 define this)

Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
---
 arch/avr32/include/asm/bitops.h |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/avr32/include/asm/bitops.h b/arch/avr32/include/asm/bitops.h
--- a/arch/avr32/include/asm/bitops.h
+++ b/arch/avr32/include/asm/bitops.h
@@ -263,6 +263,11 @@ static inline int fls(unsigned long word
 	return 32 - result;
 }
 
+static inline int __fls(unsigned long word)
+{
+	return fls(word) - 1;
+}
+
 unsigned long find_first_zero_bit(const unsigned long *addr,
 				  unsigned long size);
 unsigned long find_next_zero_bit(const unsigned long *addr,


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