The header file fs/linux.h only exists on Linux but we can also
use sys/mount.h, which also exists on Cygwin and the BSDs.
Only support block devices if BLKGETSIZE64 is defined.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Adapt save_load_state tests to include coverage of the "linear file"
backend mode. "tpm2" is save/load is tested with both a regular file and
a loop device to excercise the blockdev mmap code.
Signed-off-by: Stefan Reiter <stefan@pimaker.at>
