| 33 | } |
| 34 | |
| 35 | ssize_t rdev_relative_offset(const struct region_device *p, |
| 36 | const struct region_device *c) |
| 37 | { |
| 38 | if (rdev_root(p) != rdev_root(c)) |
| 39 | return -1; |
| 40 | |
| 41 | if (!region_is_subregion(&p->region, &c->region)) |
| 42 | return -1; |
| 43 | |
| 44 | return region_device_offset(c) - region_device_offset(p); |
| 45 | } |
| 46 | |
| 47 | void *rdev_mmap(const struct region_device *rd, size_t offset, size_t size) |
| 48 | { |