oss4-dkms: build failure with linux 5.11

[Andrea Righi]

[Impact]

oss4-dkms fails to build on the latest hirsute 5.11 kernel with the following error:

/var/lib/dkms/oss4/4.2-build2010/build/core/oss_core.c:90:10: error: implicit declaration of function ‘get_seconds’ [-Werror=implicit-function-declaration]
   90 | return get_seconds ();
      | ^~~~~~~~~~~

This happens because of commit aba428a0c612bb259891307da12e22efd0fab14c ("timekeeping: Remove unused get_seconds()").

[Test case]

Install oss4-dkms.

[Fix]

Re-introduce in oss4 the get_seconds() interface and use the standard interface ktime_get_real_seconds().

[Regression potential]

The added get_seconds() interface is going to be used only with kernels >= 5.11, so all the previously supported kernels won't be affected by this change. Potential regressions are possible only in kernels >= 5.11.

[Andrea Righi (arighi)]

Attached debdiff fixes the build errors.

[Andrea Righi (arighi)]

Edit: update launchpad bug in the changelog.

[Launchpad Janitor (janitor)]

This bug was fixed in the package oss4 - 4.2-build2010-5ubuntu8

---------------
oss4 (4.2-build2010-5ubuntu8) hirsute; urgency=medium

  * Support Linux 5.11 (LP: #1916872):
    - debian/patches/520-Linux-5.11-re-introduce-get-seconds.patch

 -- Andrea Righi <email address hidden> Thu, 25 Feb 2021 11:32:44 +0000