zram-config fails to stop on unknown rmmod -w option

[Alexander Ponyatykh]

zram-config fails to stop. The script executes "rmmod -w zram", but rmmod don't have -w option.
$ LANG=C journalctl -xe
-- Unit zram-config.service has begun shutting down.
Apr 27 11:16:43 gurren.lazyranma.ru end-zram-swapping[20419]: rmmod: ERROR: unexpected getopt_long() value 'w'.
Apr 27 11:16:43 gurren.lazyranma.ru systemd[1]: zram-config.service: control process exited, code=exited status=1
Apr 27 11:16:43 gurren.lazyranma.ru systemd[1]: Stopped Initializes zram swaping.
-- Subject: Unit zram-config.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit zram-config.service has finished shutting down.
Apr 27 11:16:43 gurren.lazyranma.ru systemd[1]: Unit zram-config.service entered failed state.
Apr 27 11:16:43 gurren.lazyranma.ru systemd[1]: zram-config.service failed.
$ sudo bash -x /usr/bin/end-zram-swapping
++ grep zram /proc/swaps
++ awk '{print $1}'
+ DEVICES='/dev/zram0
/dev/zram1
/dev/zram2
/dev/zram3'
+ for i in '$DEVICES'
+ swapoff /dev/zram0
+ for i in '$DEVICES'
+ swapoff /dev/zram1
+ for i in '$DEVICES'
+ swapoff /dev/zram2
+ for i in '$DEVICES'
+ swapoff /dev/zram3
+ rmmod -w zram
rmmod: ERROR: unexpected getopt_long() value 'w'.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: zram-config 0.3 [modified: usr/bin/init-zram-swapping]
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 27 11:17:12 2015
PackageArchitecture: all
SourcePackage: zram-config
UpgradeStatus: Upgraded to vivid on 2015-04-26 (1 days ago)

[Martin Pitt (pitti)]

Confirmed. Happens under upstart as well as it's the same script.

[Alberto Salvia Novella (es20490446e)]

@ Martin Pitt (pitti)

You forgot some details!

[Alberto Salvia Novella (es20490446e)]

I mean the bug has been marked as triaged without importance been set, or nomination for series.

[Brian Murray (brian-murray)]

The -w argument to rmmod has been present since the first version of zram-config.

[Brian Murray (brian-murray)]

And that's because -w used to be a valid argument to rmmod but that was removed between Trusty and Utopic.

kmod 16
=======

- New features:
        - Remove option from libkmod to allow waiting on module removal if
          the module is being used. It's dangerous since it can block the
          caller indefinitely.

[Didier Roche-Tolomelli (didrocks)]

Marking as duplicate of 1449678 as I referenced that one in the changelog before seeing this bug. Fixed in wily, backporting the fix to vivid. Thanks all for your contribution!