The following commit is also in the hyperv-fixes tree as a different
commit (but the same patch):
f2b558988c7d ("fbdev: hyperv_fb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs")
This is comment
304386373007 ("fbdev: hyperv_fb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs")
in the hyperv-fixes tree.