[Intel-gfx] [PATCH 3/9] drm/i915/cmdparser: Use cached vmappings

[Matthew Auld]

> +       if (dst_needs_clflush & CLFLUSH_BEFORE)
> +               batch_len = roundup(batch_len, boot_cpu_data.x86_clflush_size);
hmm, this bit doesn't seem obvious to me. What am I missing?