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author | Akinobu Mita <akinobu.mita@gmail.com> | 2011-05-26 23:26:05 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-27 00:12:38 (GMT) |
commit | e0819410dba141338ebf6ab1057c1863be6247ab (patch) | |
tree | e8c744ce78d0c4333b976be5be8bafcdda88996c /arch | |
parent | 275ac74629c4d8ec430d7edecb16d936f46a47c5 (diff) | |
download | linux-e0819410dba141338ebf6ab1057c1863be6247ab.tar.xz |
m68knommu: fix build error due to the lack of find_next_bit_le()
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/m68k/include/asm/bitops_no.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/bitops_no.h b/arch/m68k/include/asm/bitops_no.h index 6b0e2d3..b816299 100644 --- a/arch/m68k/include/asm/bitops_no.h +++ b/arch/m68k/include/asm/bitops_no.h @@ -320,6 +320,50 @@ found_middle: 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> |