drm/amdkfd: Add helper svm_range_update_checkpoint_timestamp

Extract svm_range_update_checkpoint_timestamp() from
svm_range_unmap_from_cpu(). The next patch calls it when the app sets
the no-access attribute.

Change checkpoint_ts in svm_range_list from uint64_t to atomic64_t so
svm_range_restore_pages() can read it from the page fault handler
without holding the svms lock.

No functional change, preparation for the next patch.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions