The ztest_pattern_match() function is only called from an ASSERT
and needs only to be defined when debugging is enabled. This
change is to silence a gcc warning and belong with the other
gcc issues. I'm moving it to the gcc-unused topic branch.
Native ZFS for Linux! ZFS is an advanced file system and volume manager
which was originally developed for Solaris. It has been successfully
ported to FreeBSD and now there is a functional Linux ZFS kernel port
too. The port currently includes a fully functional and stable SPA, DMU,
and ZVOL with a ZFS Posix Layer (ZPL) on the way!