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s390: introduce little-endian bitops 

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>
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>
This commit is contained in:
Akinobu Mita 2011-03-23 16:41:57 -07:00 committed by Linus Torvalds
parent f57d7ff1b8
commit 50b9b475c5
1 changed files with 52 additions and 17 deletions
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69
arch/s390/include/asm/bitops.h
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@ -742,18 +742,42 @@ 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 * 23 22 21 20 19 18 17 16 31 30 29 28 27 26 25 24
*/ */
#define ext2_set_bit(nr, addr) \ static inline void __set_bit_le(unsigned long nr, void *addr)
__test_and_set_bit((nr)^(__BITOPS_WORDSIZE - 8), (unsigned long *)addr) {
#define ext2_set_bit_atomic(lock, nr, addr) \ __set_bit(nr ^ (__BITOPS_WORDSIZE - 8), 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) 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)
{ {
unsigned long bytes, bits; unsigned long bytes, bits;
@ -764,7 +788,7 @@ static inline int ext2_find_first_zero_bit(void *vaddr, unsigned int size)
return (bits < size) ? bits : 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 offset)
{ {
unsigned long *addr = vaddr, *p; unsigned long *addr = vaddr, *p;
@ -790,11 +814,10 @@ static inline int ext2_find_next_zero_bit(void *vaddr, unsigned long size,
size -= __BITOPS_WORDSIZE; size -= __BITOPS_WORDSIZE;
p++; 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, static inline unsigned long find_first_bit_le(void *vaddr, unsigned long size)
unsigned long size)
{ {
unsigned long bytes, bits; unsigned long bytes, bits;
@ -805,7 +828,7 @@ static inline unsigned long ext2_find_first_bit(void *vaddr,
return (bits < size) ? bits : size; 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 offset)
{ {
unsigned long *addr = vaddr, *p; unsigned long *addr = vaddr, *p;
@ -831,9 +854,21 @@ static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
size -= __BITOPS_WORDSIZE; size -= __BITOPS_WORDSIZE;
p++; 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> #include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */