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m68knommu: fix build error due to the lack of find_next_bit_le()

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m68knommu can't build ext4, udf, and ocfs2 due to the lack of
find_next_bit_le().

This implements find_next_bit_le() on m68knommu by duplicating the generic
find_next_bit_le() in lib/find_next_bit.c.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Greg Ungerer <gerg@uclinux.org>
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 2011-05-26 16:26:05 -07:00 committed by Linus Torvalds
parent 275ac74629
commit e0819410db
1 changed files with 44 additions and 0 deletions
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44
arch/m68k/include/asm/bitops_no.h
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@ -320,6 +320,50 @@ static inline unsigned long find_next_zero_bit_le(void *addr, unsigned long size
return result + ffz(__swab32(tmp));
}
static inline unsigned long find_next_bit_le(const void *addr, unsigned
long size, unsigned long offset)
{
const unsigned long *p = addr;
unsigned long result = offset & ~(BITS_PER_LONG - 1);
unsigned long tmp;
if (offset >= size)
return size;
p += offset / BITS_PER_LONG;
size -= result;
offset &= (BITS_PER_LONG - 1UL);
if (offset) {
tmp = __swab32(*(p++));
tmp &= (~0UL << offset);
if (size < BITS_PER_LONG)
goto found_first;
if (tmp)
goto found_middle;
size -= BITS_PER_LONG;
result += BITS_PER_LONG;
}
while (size & ~(BITS_PER_LONG - 1)) {
tmp = *(p++);
if (tmp)
goto found_middle_swap;
result += BITS_PER_LONG;
size -= BITS_PER_LONG;
}
if (!size)
return result;
tmp = __swab32(*p);
found_first:
tmp &= (~0UL >> (BITS_PER_LONG - size));
if (tmp == 0UL) /* Are any bits set? */
return result + size; /* Nope. */
found_middle:
return result + __ffs(tmp);
found_middle_swap:
return result + __ffs(__swab32(tmp));
}
#endif /* __KERNEL__ */
#include <asm-generic/bitops/fls.h>