In particular:
- fix format specifiers in the DPRINTFs;
- do not use kernel_map for temporal mapping backed by the vnode, this
cannot work since kernel map is a system map. Use exec_map instead.
- ignore error code from an attempt to insert the hole. If supposed hole
is located at the region already populated by .bss, it is not an error.
- correctly translate vm error codes to errno, when appropriate.
Reported and tested by: Rich Naill <rich enterprisesystems net>
Approved by: re (kensmith)
MFC after: 1 week
a698574a2d