linuxkpi: `list_sort()`'s callback now takes list arguments

[dumbbell]

Summary

This change breaks the API of list_sort() and thus the compilation of existing drivers. Does anyone have a suggestion on how to handle this change beside a bump of FreeBSD_version?

This is part of the update of the DRM drivers to Linux 5.13.

[manu]

Did the API changed in Linux at some point ?
We used to have LINUXKPI_VERSION at some point, maybe we can use this again if this is a change in Linux API.

[dumbbell]

Indeed, the callback interface changed in Linux 5.13:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4f0f586bf0c898233d8f316f471a21db2abd522d

I will add a LINUXKPI_VERSION-based variant.

[dumbbell]

Support old and new list_sort() API.

[manu]

sys/compat/linuxkpi/common/src/linux_compat.c

39 ↗

(On Diff #115768)

No sure that we should define it here now.
Let's start by supporting both version, we can define LINUXKPI_VERSION in drm-kmod starting from the 5.13 branch.
And when old consumer (drm-kmod 5.10-lts branch) are deprecated we can remove the check.

[dumbbell]

sys/compat/linuxkpi/common/src/linux_compat.c

39 ↗

(On Diff #115768)

Ok, I will modify the patch to define the new header (if LINUXKPI_VERSION >= 51300), but leave linux_compat.c unmodified (it will deconstify the arguments as today).

[dumbbell]

Leave linux_compat.c unmodify (to use the old header). The KBI doesn't change anyway.