Hi Stefan,

I am Akira Hayakawa, the upstream maintainer of the kernel module.

In dm-writeboost 2.2.6 which was released last weekend, I already fixed the 


I saw that dm-writeboost in Ubuntu is bit old and I want you to immediately 
update to the upstream release.
Very important fixes have been included since 2.2.3, including resolving a 
year-long read-caching bug.

Please see the ChangeLog


As always, I hope Dmitry Smirnov is going to submit to Debian and please apply 
it to Ubuntu ASAP.

On Thu, 22 Sep 2016 09:00:50 +0200 Stefan Bader <stefan.ba...@canonical.com> 
> Package: dm-writeboost
> Version: 2.2.3-1
> Severity: normal
> Tags: patch
> User: ubuntu-de...@lists.ubuntu.com
> Usertags: origin-ubuntu yakkety ubuntu-patch
> Dear Maintainer,
> with kernel 4.8 the bi_rw element of the request queue struct was
> replaced by bi_op and bi_op_flags.
> The additional compat code ensures the module with also compile
> with 4.8 kernels running on the target DKMS system. Without this
> the dkms install step fails for 4.8 kernels.
> In Ubuntu, the attached patch was applied to achieve the following:
>   * Fix FTBS in dkms with 4.8+ kernels (LP: #1625054).
> Thanks for considering the patch.
> -- System Information:
> Debian Release: jessie/sid
>   APT prefers trusty-updates
>   APT policy: (500, 'trusty-updates'), (500, 'trusty-security'), (500, 
> 'trusty-proposed'), (500, 'trusty'), (100, 'trusty-backports')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
> Kernel: Linux 3.13.0-96-generic (SMP w/8 CPU cores)
> Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash

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