[LTP] [PATCHv2 1/3] zram/zram_lib.sh: fix variable name and algorithm retrieval

[Petr Vorel <pvorel@suse.cz>]

Hi Po-Hsu,

> thanks for the reply, and sorry for the late response too, need some
> time to throw myself back in time.

> To my understanding, the zram_algs="lzo lzo lzo lzo" in zram01.sh is a
> dummy mapping (placeholder?) for 4 compression algorithms with 4
> different setup, one for (zram_sizes=26214400, zram_mem_limits=25M,
> zram_filesystems=ext3), and one for (zram_sizes=26214400,
> zram_mem_limits=25M, zram_filesystems=ext4) and so on.

> With this patch the test will be more comprehensive, as it's not
> trying to set the algorithm to "lzo" 4 times (as defined in zram_algs
> from zram01.sh), but try to switch to all supported algorithm reported
> back from  /sys/block/zram0/comp_algorithm

> So yes, this zram_algs in zram01.sh will not be used at all after
> applying my patch here, maybe it can be removed but I am not sure if
> we should keep it there as a placeholder.

Also sorry for the delay. I rebased and merged these 2 commits, removed
$zram_algs (as it's was not used any more).
Although this and second commit should be probably as a single commit (to be an
atomic change), I kept them separate.

Thanks for your contributions.

Kind regards,
Petr