linux-kernel - [PATCH 1/3] bitops: add ifdef CONFIG_GENERIC_FIND_BIT

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Date:	Wed, 20 Apr 2011 23:20:50 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/3] bitops: add ifdef CONFIG_GENERIC_FIND_BIT_LE guard

Some architectures have optimized find_*_bit_le() as static inline
functions but other little-endian bitops are identical to the generic
version.

This adds #ifdef CONFIG_GENERIC_FIND_BIT_LE guard for find_*_bit_le()
in asm-generic/bitops/le.h so that those architectures can use this
header file.

Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: linux-arch@...r.kernel.org
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux390@...ibm.com
Cc: linux-s390@...r.kernel.org
Cc: Russell King <linux@....linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org
---
 include/asm-generic/bitops/le.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/bitops/le.h b/include/asm-generic/bitops/le.h
index 946a21b..bd2253e 100644
--- a/include/asm-generic/bitops/le.h
+++ b/include/asm-generic/bitops/le.h
@@ -30,6 +30,8 @@ static inline unsigned long find_first_zero_bit_le(const void *addr,
 
 #define BITOP_LE_SWIZZLE	((BITS_PER_LONG-1) & ~0x7)
 
+#ifdef CONFIG_GENERIC_FIND_BIT_LE
+
 extern unsigned long find_next_zero_bit_le(const void *addr,
 		unsigned long size, unsigned long offset);
 extern unsigned long find_next_bit_le(const void *addr,
@@ -38,6 +40,8 @@ extern unsigned long find_next_bit_le(const void *addr,
 #define find_first_zero_bit_le(addr, size) \
 	find_next_zero_bit_le((addr), (size), 0)
 
+#endif /* CONFIG_GENERIC_FIND_BIT_LE */
+
 #else
 #error "Please fix <asm/byteorder.h>"
 #endif
-- 
1.7.4.4

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