hwt_backend_deinit
.hwt_backend_deinit = pt_backend_deinit,
.hwt_backend_deinit = spe_backend_deinit,
ctx->hwt_backend->ops->hwt_backend_deinit(ctx);
int (*hwt_backend_deinit)(struct hwt_context *);
void hwt_backend_deinit(struct hwt_context *ctx);
hwt_backend_deinit(ctx);