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Subject[PATCH v5 07/27] s390: introduce little-endian bitops
Date
Introduce little-endian bit operations by renaming native ext2 bit
operations. The ext2 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: Arnd Bergmann <arnd@arndb.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

Change from v4:
- add casts in the macro to take any pointer types
- drop acked-by line because enough changes has been made

The whole series is available in the git branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/mita/linux-2.6.git le-bitops-v5

arch/s390/include/asm/bitops.h | 53 +++++++++++++++++++++++++--------------
1 files changed, 34 insertions(+), 19 deletions(-)

diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 2e05972..f47c8cf 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -742,18 +742,22 @@ 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 ext2_set_bit(nr, addr) \
- __test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_clear_bit(nr, addr) \
- __test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-#define ext2_test_bit(nr, addr) \
- test_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr)
-
-static inline int ext2_find_first_zero_bit(void *vaddr, unsigned int size)
+#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 int find_first_zero_bit_le(void *vaddr, unsigned int size)
{
unsigned long bytes, bits;

@@ -764,7 +768,7 @@ static inline int ext2_find_first_zero_bit(void *vaddr, unsigned int size)
return (bits < size) ? bits : size;
}

-static inline int ext2_find_next_zero_bit(void *vaddr, unsigned long size,
+static inline int find_next_zero_bit_le(void *vaddr, unsigned long size,
unsigned long offset)
{
unsigned long *addr = vaddr, *p;
@@ -790,11 +794,10 @@ static inline int ext2_find_next_zero_bit(void *vaddr, unsigned long size,
size -= __BITOPS_WORDSIZE;
p++;
}
- return offset + ext2_find_first_zero_bit(p, size);
+ return offset + find_first_zero_bit_le(p, size);
}

-static inline unsigned long ext2_find_first_bit(void *vaddr,
- unsigned long size)
+static inline unsigned long find_first_bit_le(void *vaddr, unsigned long size)
{
unsigned long bytes, bits;

@@ -805,7 +808,7 @@ static inline unsigned long ext2_find_first_bit(void *vaddr,
return (bits < size) ? bits : size;
}

-static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
+static inline int find_next_bit_le(void *vaddr, unsigned long size,
unsigned long offset)
{
unsigned long *addr = vaddr, *p;
@@ -831,8 +834,20 @@ static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
size -= __BITOPS_WORDSIZE;
p++;
}
- return offset + ext2_find_first_bit(p, size);
-}
+ return offset + find_first_bit_le(p, size);
+}
+
+#define ext2_set_bit __test_and_set_bit_le
+#define ext2_set_bit_atomic(lock, nr, addr) \
+ test_and_set_bit_le(nr, addr)
+#define ext2_clear_bit __test_and_clear_bit_le
+#define ext2_clear_bit_atomic(lock, nr, addr) \
+ test_and_clear_bit_le(nr, addr)
+#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_first_bit find_first_bit_le
+#define ext2_find_next_bit find_next_bit_le

#include <asm-generic/bitops/minix.h>

--
1.7.3.4


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