vm: Retire kmem_arena

[alc]

Summary

It has simply been an alias for the kernel_arena for many years now.
Enough time has passed to retire it.

[markj]

Out-of-tree code can make the same change, no need for a __FreeBSD_version bump I think. stable/11 is the last branch where kmem_arena is a distinct entity.

[alc]

In D46057#1049994, @markj wrote:

Out-of-tree code can make the same change, no need for a __FreeBSD_version bump I think. stable/11 is the last branch where kmem_arena is a distinct entity.

I checked drm-515-kmod, drm-61-kmod, and virtualbox-ose-kmod. They don't appear to have any direct references to kmem_arena.

[kib]

In D46057#1050007, @alc wrote:

In D46057#1049994, @markj wrote:

Out-of-tree code can make the same change, no need for a __FreeBSD_version bump I think. stable/11 is the last branch where kmem_arena is a distinct entity.

I checked drm-515-kmod, drm-61-kmod, and virtualbox-ose-kmod. They don't appear to have any direct references to kmem_arena.

I suspect the nvidia driver could, but I did not checked.

[alc]

In D46057#1050008, @kib wrote:

In D46057#1050007, @alc wrote:

In D46057#1049994, @markj wrote:

Out-of-tree code can make the same change, no need for a __FreeBSD_version bump I think. stable/11 is the last branch where kmem_arena is a distinct entity.

I checked drm-515-kmod, drm-61-kmod, and virtualbox-ose-kmod. They don't appear to have any direct references to kmem_arena.

I suspect the nvidia driver could, but I did not checked.

I just grep'ed nvidia-drm-61-kmod for it, and didn't find it.