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authorAkinobu Mita <akinobu.mita@gmail.com>2011-03-23 16:41:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 19:46:11 -0700
commit63ab595fb6b34234f116f05f95dc752dd5f8affb (patch)
tree37bf0cd86463e24df2f0162190be38e75c4af7b6 /include
parent12ce22423abacca70bf1dfbcb8543b3e2b74aad4 (diff)
bitops: merge little and big endian definisions in asm-generic/bitops/le.h
This patch series introduces little-endian bit operations in asm/bitops.h for all architectures and converts all ext2 non-atomic and minix bit operations to use little-endian bit operations. It enables us to remove ext2 non-atomic and minix bit operations from asm/bitops.h. The reason they should be removed from asm/bitops.h is as follows: For ext2 non-atomic bit operations, they are used for little-endian byte order bitmap access by some filesystems and modules. But using ext2_*() functions on a module other than ext2 filesystem makes some feel strange. For minix bit operations, they are only used by minix filesystem and are useless by other modules. Because byte order of inode and block bitmap is This patch: In order to make the forthcoming changes smaller, this merges macro definisions in asm-generic/bitops/le.h for big-endian and little-endian as much as possible. This also removes unused BITOP_WORD macro. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/bitops/le.h46
1 files changed, 20 insertions, 26 deletions
diff --git a/include/asm-generic/bitops/le.h b/include/asm-generic/bitops/le.h
index 80e3bf13b2b..9085429ff3c 100644
--- a/include/asm-generic/bitops/le.h
+++ b/include/asm-generic/bitops/le.h
@@ -4,27 +4,33 @@
#include <asm/types.h>
#include <asm/byteorder.h>
-#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
-#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
-
#if defined(__LITTLE_ENDIAN)
-#define generic_test_le_bit(nr, addr) test_bit(nr, addr)
-#define generic___set_le_bit(nr, addr) __set_bit(nr, addr)
-#define generic___clear_le_bit(nr, addr) __clear_bit(nr, addr)
-
-#define generic_test_and_set_le_bit(nr, addr) test_and_set_bit(nr, addr)
-#define generic_test_and_clear_le_bit(nr, addr) test_and_clear_bit(nr, addr)
-
-#define generic___test_and_set_le_bit(nr, addr) __test_and_set_bit(nr, addr)
-#define generic___test_and_clear_le_bit(nr, addr) __test_and_clear_bit(nr, addr)
+#define BITOP_LE_SWIZZLE 0
-#define generic_find_next_zero_le_bit(addr, size, offset) find_next_zero_bit(addr, size, offset)
+#define generic_find_next_zero_le_bit(addr, size, offset) \
+ find_next_zero_bit(addr, size, offset)
#define generic_find_next_le_bit(addr, size, offset) \
- find_next_bit(addr, size, offset)
+ find_next_bit(addr, size, offset)
+#define generic_find_first_zero_le_bit(addr, size) \
+ find_first_zero_bit(addr, size)
#elif defined(__BIG_ENDIAN)
+#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
+
+extern unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
+ unsigned long size, unsigned long offset);
+extern unsigned long generic_find_next_le_bit(const unsigned long *addr,
+ unsigned long size, unsigned long offset);
+
+#define generic_find_first_zero_le_bit(addr, size) \
+ generic_find_next_zero_le_bit((addr), (size), 0)
+
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+
#define generic_test_le_bit(nr, addr) \
test_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
#define generic___set_le_bit(nr, addr) \
@@ -42,16 +48,4 @@
#define generic___test_and_clear_le_bit(nr, addr) \
__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
-extern unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
- unsigned long size, unsigned long offset);
-extern unsigned long generic_find_next_le_bit(const unsigned long *addr,
- unsigned long size, unsigned long offset);
-
-#else
-#error "Please fix <asm/byteorder.h>"
-#endif
-
-#define generic_find_first_zero_le_bit(addr, size) \
- generic_find_next_zero_le_bit((addr), (size), 0)
-
#endif /* _ASM_GENERIC_BITOPS_LE_H_ */