kern/57772: DRMKMS (drm2/): incorrect memory compuation

[tlaronde%kergis.com@localhost]

>Number:         57772
>Category:       kern
>Synopsis:       DRMKMS (drm2/): incorrect memory compuation
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Dec 14 16:45:00 +0000 2023
>Originator:     Thierry LARONDE
>Release:        Current
>Organization:
>Environment:
NetBSD cauchy.polynum.local 10.99.10 NetBSD 10.99.10 (CAUCHY) #4: Thu Dec 14 17:15:06 CET 2023  tlaronde@cauchy.polynum.local:/data/m/netbsd-10/sys/arch/amd64/compile/CAUCHY amd64
>Description:
Memory allocation is done based on values defined in a reduced Linux sysinfo(2) like struct.

But *high doesn't make sense in NetBSD and even on Linux it is not always used.

Furthermore, the current value assigned is a virtual address leading to such display:

[     4.193896] Zone  kernel: Available graphics memory: 9007199254113272 KiB
[     4.193896] Zone   dma32: Available graphics memory: 2097152 KiB

And the totalhigh value is used in amdgpu code where it can do, with such a value, no good.
>How-To-Repeat:

>Fix: