Bug#959189: bbswitch-dkms: fails to build for kernel 5.6.7

[Giacomo Mulas]

Package: bbswitch-dkms
Version: 0.8-8
Severity: important

Dear Maintainer,

with the recent release on sid of the new linux kernel 5.6.7, I stumbled on
a problem with the bbswitch module, which fails to build with the following
error message:

make[1]: ingresso nella directory "/usr/src/linux-source-5.6.7.1"
  CC [M]  /var/lib/dkms/bbswitch/0.8/build/bbswitch.o
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c: In function ‘bbswitch_init’:
/var/lib/dkms/bbswitch/0.8/build/bbswitch.c:460:63: error: passing argument 4 of ‘proc_create’ from incompatible pointer type [-Werror=incompatible-pointer-types]
  460 |     acpi_entry = proc_create("bbswitch", 0664, acpi_root_dir, &bbswitch_fops);
      |                                                               ^~~~~~~~~~~~~~
      |                                                               |
      |                                                               struct file_operations *
In file included from ./include/acpi/acpi_bus.h:83,
                 from ./include/linux/acpi.h:32,
                 from /var/lib/dkms/bbswitch/0.8/build/bbswitch.c:32:
./include/linux/proc_fs.h:64:24: note: expected ‘const struct proc_ops *’ but argument is of type ‘struct file_operations *’
   64 | struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops);
      |                        ^~~~~~~~~~~

Apparently some structures changed in the new kernel, making it incompatible
with bbswitch.

Of course, it still builds and works on 5.5.x and older kernels, but still,
since 5.6.x is now the default on sid I think this should be tagged important.

Thanks in advance, best regards
Giacomo Mulas

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (401, 'unstable'), (10, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.5.17-jak (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=it_IT.utf8, LC_CTYPE=it_IT.utf8 (charmap=UTF-8) (ignored: LC_ALL set to it_IT.utf8), LANGUAGE=it_IT,en_EN (charmap=UTF-8) (ignored: LC_ALL set to it_IT.utf8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages bbswitch-dkms depends on:
ii  dkms  2.8.1-5

bbswitch-dkms recommends no packages.

Versions of packages bbswitch-dkms suggests:
ii  bumblebee  3.2.1-22

-- no debconf information