Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> Rather than call a function to compute the matching cachelines and
> clflush them, just call the clflush *instruction* directly. We also know
> that we can use the unpatched plain clflush rather than the clflushopt
> alternative.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> Cc: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_ringbuffer.h | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
> index dfb14bfe5bc8..e2b2dc2c2f49 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.h
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
> @@ -393,8 +393,9 @@ intel_ring_sync_index(struct intel_engine_cs *ring,
> static inline void
> intel_flush_status_page(struct intel_engine_cs *ring, int reg)
> {
> - drm_clflush_virt_range(&ring->status_page.page_addr[reg],
> - sizeof(uint32_t));
> + mb();
> + clflush(&ring->status_page.page_addr[reg]);
> + mb();
> }
>
> static inline u32
> --
> 2.7.0
>
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