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For wsl, doorbell ring needs to call hsaKmtQueueRingDoorbell instead of atomic store in hsa runtime. It does not care about the doorbell signal value. So just return a pointer that points a memory allocation of 8 bytes. Signed-off-by: Longlong Yao <Longlong.Yao@amd.com> Reviewed-by: lyndonli <Lyndon.Li@amd.com> Part-of: <http://10.67.69.192/wsl/libhsakmt/-/merge_requests/14>