acpi-call-dkms: module fails to build beginning with mainline kernel 4.12.x

[Benjamin Schmid]

Due to my Skylake-based hardware I'm trying to run the latest mainline kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/ on my Ubuntu 16.04 LTS/xenial (Linux Mint Variant) installation. I'm using the Ukuu kernel upgrade utility for that purpose.

Beginning with 4.12 acpi-call-dkms (1.1.0-2) fails to build.

Here the relevant excerpt of make.log

DKMS make.log for acpi-call-1.1.0 for kernel 4.12.3-041203-generic (x86_64)
...
/var/lib/dkms/acpi-call/1.1.0/build/acpi_call.c: In function ‘acpi_proc_write’:
/var/lib/dkms/acpi-call/1.1.0/build/acpi_call.c:277:9: error: implicit declaration of function ‘copy_from_user’ [-Werror=implicit-function-declaration]
     if (copy_from_user( input, buff, len )) {
         ^

I'm unsure if this is out of scope for Ubuntu but wanted to raise awareness somewhere.

[Launchpad Janitor (janitor)]

This bug was fixed in the package acpi-call - 1.1.0-4

---------------
acpi-call (1.1.0-4) unstable; urgency=low

  * [45b90c6] Fix build failure on 4.12.
    Include the correct header for copy_from_user prototype
    Thanks to Colin Ian King for the patch (Closes: #868110)
    (LP: #1700783, #1705678)
  * [ba63573] Bump Standards-Version to 4.0.0, no changes needed
  * [7640fff] Bump debhelper compat to 10
  * [ea4dd52] Drop build-dependency on dpkg-dev

 -- Raphaël Halimi <email address hidden> Mon, 24 Jul 2017 20:58:44 +0200