Buildbots and zfs-tests regularly see 7 kilobytes of stack
usage with this function. Convert self-calls to iterations
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: DHE <git@dehacked.net>
Closes#6219
ZFS is an advanced file system and volume manager which was originally
developed for Solaris and is now maintained by the Illumos community.
ZFS on Linux, which is also known as ZoL, is currently feature complete. It
includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers. And it's native!