linux-kernel - [PATCH -mm 3/6] s390: convert little-endian bitops macros to static inline functions

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Date:	Thu, 27 Jan 2011 22:56:20 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [PATCH -mm 3/6] s390: convert little-endian bitops macros to static inline functions

(This patch is intended to be folded into the patch in -mm:
s390-introduce-little-endian-bitops.patch)

The little-endian bitops on s390 are written as preprocessor
macros with the cast to "unsigned long *".
This means that even non-pointers will be accepted without an error, and
that is a Very Bad Thing.

This converts the little-endian bitops macros to static inline functions
with proper prototypes.

Suggested-by: "H. Peter Anvin" <hpa@...or.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
---
 arch/s390/include/asm/bitops.h |   48 ++++++++++++++++++++++++++++-----------
 1 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 6528b22..e1c8f3a 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -742,20 +742,40 @@ static inline int sched_find_first_bit(unsigned long *b)
  *    23 22 21 20 19 18 17 16 31 30 29 28 27 26 25 24
  */
 
-#define __set_bit_le(nr, addr)	\
-	__set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define __clear_bit_le(nr, addr)	\
-	__clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define __test_and_set_bit_le(nr, addr)	\
-	__test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define test_and_set_bit_le(nr, addr)	\
-	test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define __test_and_clear_bit_le(nr, addr)	\
-	__test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define test_and_clear_bit_le(nr, addr)	\
-	test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
-#define test_bit_le(nr, addr)	\
-	test_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)(addr))
+static inline void __set_bit_le(unsigned long nr, void *addr)
+{
+	__set_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline void __clear_bit_le(unsigned long nr, void *addr)
+{
+	__clear_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline int __test_and_set_bit_le(unsigned long nr, void *addr)
+{
+	return __test_and_set_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline int test_and_set_bit_le(unsigned long nr, void *addr)
+{
+	return test_and_set_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline int __test_and_clear_bit_le(unsigned long nr, void *addr)
+{
+	return __test_and_clear_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline int test_and_clear_bit_le(unsigned long nr, void *addr)
+{
+	return test_and_clear_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
+
+static inline int test_bit_le(unsigned long nr, const void *addr)
+{
+	return test_bit(nr ^ (__BITOPS_WORDSIZE - 8), addr);
+}
 
 static inline int find_first_zero_bit_le(void *vaddr, unsigned int size)
 {
-- 
1.7.3.4

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