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[S390] Implement ext2_find_next_bit.

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Fixes this compile error:

fs/ext4/mballoc.c:
	In function 'ext4_mb_generate_buddy':
fs/ext4/mballoc.c:954:
	error: implicit declaration of function 'generic_find_next_le_bit'

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2008-02-05 16:50:44 +01:00 committed by Martin Schwidefsky
parent 0abbf05cdd
commit 67fe9251bb
1 changed files with 41 additions and 2 deletions
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43
include/asm-s390/bitops.h
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@ -790,8 +790,6 @@ static inline int sched_find_first_bit(unsigned long *b)
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)
#define ext2_find_next_bit(addr, size, off) \
generic_find_next_le_bit((unsigned long *)(addr), (size), (off))
static inline int ext2_find_first_zero_bit(void *vaddr, unsigned int size)
{
@ -833,6 +831,47 @@ static inline int ext2_find_next_zero_bit(void *vaddr, unsigned long size,
return offset + ext2_find_first_zero_bit(p, size);
}
static inline unsigned long ext2_find_first_bit(void *vaddr,
unsigned long size)
{
unsigned long bytes, bits;
if (!size)
return 0;
bytes = __ffs_word_loop(vaddr, size);
bits = __ffs_word(bytes*8, __load_ulong_le(vaddr, bytes));
return (bits < size) ? bits : size;
}
static inline int ext2_find_next_bit(void *vaddr, unsigned long size,
unsigned long offset)
{
unsigned long *addr = vaddr, *p;
unsigned long bit, set;
if (offset >= size)
return size;
bit = offset & (__BITOPS_WORDSIZE - 1);
offset -= bit;
size -= offset;
p = addr + offset / __BITOPS_WORDSIZE;
if (bit) {
/*
* s390 version of ffz returns __BITOPS_WORDSIZE
* if no zero bit is present in the word.
*/
set = ffs(__load_ulong_le(p, 0) >> bit) + bit;
if (set >= size)
return size + offset;
if (set < __BITOPS_WORDSIZE)
return set + offset;
offset += __BITOPS_WORDSIZE;
size -= __BITOPS_WORDSIZE;
p++;
}
return offset + ext2_find_first_bit(p, size);
}
#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */