diff options
| -rw-r--r-- | include/qemu/bitops.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 340b1e73bd..7e2d5c996e 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -157,7 +157,17 @@ unsigned long find_next_zero_bit(const unsigned long *addr, static inline unsigned long find_first_bit(const unsigned long *addr, unsigned long size) { - return find_next_bit(addr, size, 0); + unsigned long result, tmp; + + for (result = 0; result < size; result += BITS_PER_LONG) { + tmp = *addr++; + if (tmp) { + result += ctzl(tmp); + return result < size ? result : size; + } + } + /* Not found */ + return size; } /** |