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vt(4): Return errors from `vt_{,de}allocate()`

Description

vt(4): Return errors from vt_{,de}allocate()

This is useful to the DRM drivers to let them know if a device is
effectively used by the console.

Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38089

Details

Provenance
dumbbellAuthored on Jan 14 2023, 6:22 PM
Reviewer
manu
Differential Revision
D38089: vt(4): Return errors from `vt_{,de}allocate()`
Parents
rG9491ea7c6822: linuxkpi: Fix `atomic_long_sub()` overflow
Branches
Unknown
Tags
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