linux-kernel - [PATCH -mm 2/6] powerpc: convert little-endian bitops macros to static inline functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 27 Jan 2011 22:56:19 +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>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH -mm 2/6] powerpc: convert little-endian bitops macros to static inline functions

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

The little-endian bitops on powerpc 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: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: linuxppc-dev@...ts.ozlabs.org
---
 arch/powerpc/include/asm/bitops.h |   43 +++++++++++++++++++++++++------------
 1 files changed, 29 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h
index fe67024..2e56187 100644
--- a/arch/powerpc/include/asm/bitops.h
+++ b/arch/powerpc/include/asm/bitops.h
@@ -288,20 +288,35 @@ static __inline__ int test_bit_le(unsigned long nr,
 	return (tmp[nr >> 3] >> (nr & 7)) & 1;
 }
 
-#define __set_bit_le(nr, addr) \
-	__set_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
-#define __clear_bit_le(nr, addr) \
-	__clear_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
-
-#define test_and_set_bit_le(nr, addr) \
-	test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
-#define test_and_clear_bit_le(nr, addr) \
-	test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
-
-#define __test_and_set_bit_le(nr, addr) \
-	__test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
-#define __test_and_clear_bit_le(nr, addr) \
-	__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (unsigned long *)(addr))
+static inline void __set_bit_le(int nr, void *addr)
+{
+	__set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
+
+static inline void __clear_bit_le(int nr, void *addr)
+{
+	__clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
+
+static inline int test_and_set_bit_le(int nr, void *addr)
+{
+	return test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
+
+static inline int test_and_clear_bit_le(int nr, void *addr)
+{
+	return test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
+
+static inline int __test_and_set_bit_le(int nr, void *addr)
+{
+	return __test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
+
+static inline int __test_and_clear_bit_le(int nr, void *addr)
+{
+	return __test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
+}
 
 #define find_first_zero_bit_le(addr, size) \
 	find_next_zero_bit_le((addr), (size), 0)
-- 
1.7.3.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/