drm/i915: drop alignment ringbuffer parameter

Always PAGE_SIZE and only complicates the code.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -610,7 +610,7 @@ int intel_init_ring_buffer(struct drm_device *dev,
 
 	ring->gem_object = obj;
 
-	ret = i915_gem_object_pin(obj, ring->alignment);
+	ret = i915_gem_object_pin(obj, PAGE_SIZE);
 	if (ret)
 		goto err_unref;
 
@@ -767,7 +767,6 @@ static const struct intel_ring_buffer render_ring = {
 	.id			= RING_RENDER,
 	.mmio_base		= RENDER_RING_BASE,
 	.size			= 32 * PAGE_SIZE,
-	.alignment		= PAGE_SIZE,
 	.setup_status_page	= render_setup_status_page,
 	.init			= init_render_ring,
 	.set_tail		= ring_set_tail,
@@ -787,7 +786,6 @@ static const struct intel_ring_buffer bsd_ring = {
 	.id			= RING_BSD,
 	.mmio_base		= BSD_RING_BASE,
 	.size			= 32 * PAGE_SIZE,
-	.alignment		= PAGE_SIZE,
 	.setup_status_page	= bsd_setup_status_page,
 	.init			= init_bsd_ring,
 	.set_tail		= ring_set_tail,
@@ -874,7 +872,6 @@ static const struct intel_ring_buffer gen6_bsd_ring = {
        .id			= RING_BSD,
        .mmio_base		= GEN6_BSD_RING_BASE,
        .size			= 32 * PAGE_SIZE,
-       .alignment		= PAGE_SIZE,
        .setup_status_page	= gen6_bsd_setup_status_page,
        .init			= init_bsd_ring,
        .set_tail		= gen6_bsd_ring_set_tail,

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -25,7 +25,6 @@ struct  intel_ring_buffer {
 	} id;
 	u32		mmio_base;
 	unsigned long	size;
-	unsigned int	alignment;
 	void		*virtual_start;
 	struct		drm_device *dev;
 	struct		drm_gem_object *gem_object;