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Add a new KUnit test gpu_test_buddy_addr_to_block() that validates the gpu_buddy_allocated_addr_to_block() helper which traces a address back to its allocated buddy block. The test covers: - Exact address matching returns the correct allocated block - An unallocated address inside the manager should return NULL - An address outside the manager should return -ENXIO v4(MattA): - Add test for unaligned address v3(Sashiko): - remove unused target_addr variable v2(Sashiko): - Drop the mutex and lockdep annotation; standalone KUnit tests do not register a driver lock. Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com> Link: https://patch.msgid.link/20260806053624.3215216-6-tejas.upadhyay@intel.com