> +struct ib_pd *rvt_alloc_pd(struct ib_device *ibdev,
> + struct ib_ucontext *context,
> + struct ib_udata *udata)
> +{
> + struct rvt_dev_info *dev = ib_to_rvt(ibdev);
> + struct rvt_pd *pd;
> + struct ib_pd *ret;
> +
> + pd = kmalloc(sizeof(*pd), GFP_KERNEL);
> + if (!pd) {
> + ret = ERR_PTR(-ENOMEM);
> + goto bail;
> + }
> + /*
> + * This is actually totally arbitrary. Some correctness tests
> + * assume there's a maximum number of PDs that can be allocated.
> + * We don't actually have this limit, but we fail the test if
> + * we allow allocations of more than we report for this value.
> + */
Why not trap this in user space, rather than forcing the kernel to support some test program?
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