arm: introduce little-endian bitops

Introduce little-endian bit operations by renaming native ext2 bit
operations.  The ext2 and minix bit operations are kept as wrapper macros
using little-endian bit operations to maintain bisectability until the
conversions are finished.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 65 insertions, 26 deletions

diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index af54ed102f5f..0112005f3e9f 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -287,41 +287,80 @@ static inline int fls(int x)
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/lock.h>
 
+static inline void __set_bit_le(int nr, void *addr)
+{
+        __set_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline void __clear_bit_le(int nr, void *addr)
+{
+        __clear_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int __test_and_set_bit_le(int nr, void *addr)
+{
+        return __test_and_set_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int test_and_set_bit_le(int nr, void *addr)
+{
+        return test_and_set_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int __test_and_clear_bit_le(int nr, void *addr)
+{
+        return __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int test_and_clear_bit_le(int nr, void *addr)
+{
+        return test_and_clear_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int test_bit_le(int nr, const void *addr)
+{
+        return test_bit(WORD_BITOFF_TO_LE(nr), addr);
+}
+
+static inline int find_first_zero_bit_le(const void *p, unsigned size)
+{
+        return _find_first_zero_bit_le(p, size);
+}
+
+static inline int find_next_zero_bit_le(const void *p, int size, int offset)
+{
+        return _find_next_zero_bit_le(p, size, offset);
+}
+
+static inline int find_next_bit_le(const void *p, int size, int offset)
+{
+        return _find_next_bit_le(p, size, offset);
+}
+
 /*
  * Ext2 is defined to use little-endian byte ordering.
  * These do not need to be atomic.
  */
-#define ext2_set_bit(nr,p)                      \
-                __test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_set_bit_atomic(lock,nr,p)          \
-                test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_clear_bit(nr,p)                    \
-                __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_clear_bit_atomic(lock,nr,p)        \
-                test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_test_bit(nr,p)                     \
-                test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define ext2_find_first_zero_bit(p,sz)          \
-                _find_first_zero_bit_le(p,sz)
-#define ext2_find_next_zero_bit(p,sz,off)       \
-                _find_next_zero_bit_le(p,sz,off)
-#define ext2_find_next_bit(p, sz, off) \
-                _find_next_bit_le(p, sz, off)
+#define ext2_set_bit __test_and_set_bit_le
+#define ext2_set_bit_atomic(lock, nr, p)        \
+                test_and_set_bit_le(nr, p)
+#define ext2_clear_bit __test_and_clear_bit_le
+#define ext2_clear_bit_atomic(lock, nr, p)      \
+                test_and_clear_bit_le(nr, p)
+#define ext2_test_bit test_bit_le
+#define ext2_find_first_zero_bit find_first_zero_bit_le
+#define ext2_find_next_zero_bit find_next_zero_bit_le
+#define ext2_find_next_bit find_next_bit_le
 
 /*
  * Minix is defined to use little-endian byte ordering.
  * These do not need to be atomic.
  */
-#define minix_set_bit(nr,p)                     \
-                __set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_bit(nr,p)                    \
-                test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_and_set_bit(nr,p)            \
-                __test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_test_and_clear_bit(nr,p)          \
-                __test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
-#define minix_find_first_zero_bit(p,sz)         \
-                _find_first_zero_bit_le(p,sz)
+#define minix_set_bit __set_bit_le
+#define minix_test_bit test_bit_le
+#define minix_test_and_set_bit __test_and_set_bit_le
+#define minix_test_and_clear_bit __test_and_clear_bit_le
+#define minix_find_first_zero_bit find_first_zero_bit_le
 
 #endif /* __KERNEL__ */