drm/radeon: fence virtual address and free it once idle v4
Virtual address need to be fenced to know when we can safely remove it.
This patch also properly clear the pagetable. Previously it was
Kernel 3.5/3.4 need a similar patch but adapted for difference in mutex locking.
v2: For to update pagetable when unbinding bo (don't bailout if
bo_va->valid is true).
v3: Add kernel 3.5/3.4 comment.
v4: Fix compilation warnings.
Signed-off-by: Jerome Glisse <firstname.lastname@example.org>
Reviewed-by: Alex Deucher <email@example.com>
5 files changed