drm/i915: Remove unused intel_ring_cacheline_align

	return cs;

}

/* Align the ring tail to a cacheline boundary */

int intel_ring_cacheline_align(struct i915_request *rq)

{

	int num_dwords;

	void *cs;

	num_dwords = (rq->ring->emit & (CACHELINE_BYTES - 1)) / sizeof(u32);

	if (num_dwords == 0)

		return 0;

	num_dwords = CACHELINE_DWORDS - num_dwords;

	GEM_BUG_ON(num_dwords & 1);

	cs = intel_ring_begin(rq, num_dwords);

	if (IS_ERR(cs))

		return PTR_ERR(cs);

	memset64(cs, (u64)MI_NOOP << 32 | MI_NOOP, num_dwords / 2);

	intel_ring_advance(rq, cs + num_dwords);

	GEM_BUG_ON(rq->ring->emit & (CACHELINE_BYTES - 1));

	return 0;

}

#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)

#include "selftest_ring.c"

#endif

intel_engine_create_ring(struct intel_engine_cs *engine, int size);

u32 *intel_ring_begin(struct i915_request *rq, unsigned int num_dwords);

int intel_ring_cacheline_align(struct i915_request *rq);

unsigned int intel_ring_update_space(struct intel_ring *ring);