linux-kernel - [PATCH] x86: switch x86_64 to generic find_first

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Message-ID: <20080401154126.GA26062@mailshack.com>
Date:	Tue, 1 Apr 2008 17:41:26 +0200
From:	Alexander van Heukelum <heukelum@...lshack.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexander van Heukelum <heukelum@...tmail.fm>
Subject: [PATCH] x86: switch x86_64 to generic find_first_bit

[PATCH] x86: switch x86_64 to generic find_first_bit

Switch x86_64 to generic find_first_bit. The x86_64-specific
implementation is not removed.

Signed-off-by: Alexander van Heukelum <heukelum@...tmail.fm>

---
 arch/x86/Kconfig            |    2 +-
 arch/x86/lib/bitops_64.c    |    2 ++
 include/asm-x86/bitops_64.h |    2 ++
 3 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fa7d16d..e37e286 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -81,7 +81,7 @@ config GENERIC_BUG
 	depends on BUG
 
 config GENERIC_FIND_FIRST_BIT
-	def_bool X86_32
+	def_bool y
 
 config GENERIC_FIND_NEXT_BIT
 	def_bool y
diff --git a/arch/x86/lib/bitops_64.c b/arch/x86/lib/bitops_64.c
index 0eeb704..568467d 100644
--- a/arch/x86/lib/bitops_64.c
+++ b/arch/x86/lib/bitops_64.c
@@ -1,3 +1,4 @@
+#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
 #include <linux/bitops.h>
 
 #undef find_first_zero_bit
@@ -105,3 +106,4 @@ long find_first_bit(const unsigned long * addr, unsigned long size)
 
 EXPORT_SYMBOL(find_first_bit);
 EXPORT_SYMBOL(find_first_zero_bit);
+#endif
diff --git a/include/asm-x86/bitops_64.h b/include/asm-x86/bitops_64.h
index d133520..4081d7e 100644
--- a/include/asm-x86/bitops_64.h
+++ b/include/asm-x86/bitops_64.h
@@ -5,6 +5,7 @@
  * Copyright 1992, Linus Torvalds.
  */
 
+#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
 extern long find_first_zero_bit(const unsigned long *addr, unsigned long size);
 extern long find_first_bit(const unsigned long *addr, unsigned long size);
 
@@ -24,6 +25,7 @@ static inline long __scanbit(unsigned long val, unsigned long max)
 	((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG	\
 	  ? (__scanbit(~*(unsigned long *)(addr), (size)))		\
 	  : find_first_zero_bit((addr), (size))))
+#endif
 
 static inline void set_bit_string(unsigned long *bitmap, unsigned long i,
 				  int len)
-- 
1.5.2.5


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