drm: Remove __OS_HAS_AGP

We already express the drm/agp depencies correctly in Kconfig, so we
can rip this remnant from the shared drm core days.

Aside: Pretty much all the #ifdefs in radeon/nouveau could be killed
if ttm would provide dummy functions. I'm not going to volunteer for
that though.

v2: Use IS_ENABLED(CONFIG_AGP) as suggested by Ville

v3: Polish from Ville's review.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com> (v2)
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 45e7719..f458d6e 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -6,7 +6,7 @@
 		drm_context.o drm_dma.o \
 		drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
 		drm_lock.o drm_memory.o drm_drv.o drm_vm.o \
-		drm_agpsupport.o drm_scatter.o drm_pci.o \
+		drm_scatter.o drm_pci.o \
 		drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
 		drm_crtc.o drm_modes.o drm_edid.o \
 		drm_info.o drm_debugfs.o drm_encoder_slave.o \
@@ -19,6 +19,7 @@
 drm-$(CONFIG_PCI) += ati_pcigart.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 drm-$(CONFIG_OF) += drm_of.o
+drm-$(CONFIG_AGP) += drm_agpsupport.o
 
 drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_probe_helper.o \
 		drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o
diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index 4b2b4aa..a10ea6a 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -36,8 +36,6 @@
 #include <linux/slab.h>
 #include "drm_legacy.h"
 
-#if __OS_HAS_AGP
-
 #include <asm/agp.h>
 
 /**
@@ -502,5 +500,3 @@
 	return mem;
 }
 EXPORT_SYMBOL(drm_agp_bind_pages);
-
-#endif /* __OS_HAS_AGP */
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index 569064a..f1a204d 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -582,7 +582,7 @@
 	}
 }
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 /**
  * Add AGP buffers for DMA transfers.
  *
@@ -756,7 +756,7 @@
 	return 0;
 }
 EXPORT_SYMBOL(drm_legacy_addbufs_agp);
-#endif				/* __OS_HAS_AGP */
+#endif /* CONFIG_AGP */
 
 int drm_legacy_addbufs_pci(struct drm_device *dev,
 			   struct drm_buf_desc *request)
@@ -1145,7 +1145,7 @@
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (request->flags & _DRM_AGP_BUFFER)
 		ret = drm_legacy_addbufs_agp(dev, request);
 	else
diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
index ddfa601..57676f8 100644
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -720,7 +720,7 @@
 	return 0;
 }
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 typedef struct drm_agp_mode32 {
 	u32 mode;	/**< AGP mode */
 } drm_agp_mode32_t;
@@ -882,7 +882,7 @@
 
 	return drm_ioctl(file, DRM_IOCTL_AGP_UNBIND, (unsigned long)request);
 }
-#endif				/* __OS_HAS_AGP */
+#endif /* CONFIG_AGP */
 
 typedef struct drm_scatter_gather32 {
 	u32 size;	/**< In bytes -- will round to page boundary */
@@ -1090,7 +1090,7 @@
 	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX32)] = compat_drm_getsareactx,
 	[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX32)] = compat_drm_resctx,
 	[DRM_IOCTL_NR(DRM_IOCTL_DMA32)] = compat_drm_dma,
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE32)] = compat_drm_agp_enable,
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO32)] = compat_drm_agp_info,
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC32)] = compat_drm_agp_alloc,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index d93e737..cc94ecc 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -571,7 +571,7 @@
 
 	DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
index a521ef6..87a8cb7 100644
--- a/drivers/gpu/drm/drm_memory.c
+++ b/drivers/gpu/drm/drm_memory.c
@@ -38,7 +38,7 @@
 #include <drm/drmP.h>
 #include "drm_legacy.h"
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 
 #ifdef HAVE_PAGE_AGP
 # include <asm/agp.h>
@@ -111,14 +111,14 @@
 	return agp_unbind_memory(handle);
 }
 
-#else  /*  __OS_HAS_AGP  */
+#else /*  CONFIG_AGP  */
 static inline void *agp_remap(unsigned long offset, unsigned long size,
 			      struct drm_device * dev)
 {
 	return NULL;
 }
 
-#endif				/* agp */
+#endif /* CONFIG_AGP */
 
 void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev)
 {
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index aab49ee..f90bd5f 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -95,7 +95,7 @@
  * Find the right map and if it's AGP memory find the real physical page to
  * map, get the page, increment the use count and return it.
  */
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct drm_file *priv = vma->vm_file->private_data;
@@ -168,12 +168,12 @@
 vm_fault_error:
 	return VM_FAULT_SIGBUS;	/* Disallow mremap */
 }
-#else				/* __OS_HAS_AGP */
+#else
 static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	return VM_FAULT_SIGBUS;
 }
-#endif				/* __OS_HAS_AGP */
+#endif
 
 /**
  * \c nopage method for shared virtual memory.
@@ -556,7 +556,7 @@
 	 * --BenH.
 	 */
 	if (!vma->vm_pgoff
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	    && (!dev->agp
 		|| dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
 #endif
diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c
index 8cfa9cb..1f2f9ca 100644
--- a/drivers/gpu/drm/mga/mga_dma.c
+++ b/drivers/gpu/drm/mga/mga_dma.c
@@ -416,7 +416,7 @@
 	return 0;
 }
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 /**
  * Bootstrap the driver for AGP DMA.
  *
@@ -947,7 +947,7 @@
 			drm_legacy_ioremapfree(dev->agp_buffer_map, dev);
 
 		if (dev_priv->used_new_dma_init) {
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 			if (dev_priv->agp_handle != 0) {
 				struct drm_agp_binding unbind_req;
 				struct drm_agp_buffer free_req;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 15057b3..78f520d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -574,7 +574,7 @@
 nouveau_ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
 		      uint32_t page_flags, struct page *dummy_read)
 {
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	struct nouveau_drm *drm = nouveau_bdev(bdev);
 
 	if (drm->agp.bridge) {
@@ -1366,7 +1366,7 @@
 		/* System memory */
 		return 0;
 	case TTM_PL_TT:
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		if (drm->agp.bridge) {
 			mem->bus.offset = mem->start << PAGE_SHIFT;
 			mem->bus.base = drm->agp.base;
@@ -1496,7 +1496,7 @@
 	    ttm->caching_state == tt_uncached)
 		return ttm_dma_populate(ttm_dma, dev->dev);
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (drm->agp.bridge) {
 		return ttm_agp_tt_populate(ttm);
 	}
@@ -1563,7 +1563,7 @@
 		return;
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (drm->agp.bridge) {
 		ttm_agp_tt_unpopulate(ttm);
 		return;
diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c
index 2c45ac9..14fd83b5f 100644
--- a/drivers/gpu/drm/r128/r128_cce.c
+++ b/drivers/gpu/drm/r128/r128_cce.c
@@ -311,7 +311,7 @@
 	/* The manual (p. 2) says this address is in "VM space".  This
 	 * means it's an offset from the start of AGP space.
 	 */
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (!dev_priv->is_pci)
 		ring_start = dev_priv->cce_ring->offset - dev->agp->base;
 	else
@@ -505,7 +505,7 @@
 	    (drm_r128_sarea_t *) ((u8 *) dev_priv->sarea->handle +
 				  init->sarea_priv_offset);
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (!dev_priv->is_pci) {
 		drm_legacy_ioremap_wc(dev_priv->cce_ring, dev);
 		drm_legacy_ioremap_wc(dev_priv->ring_rptr, dev);
@@ -529,7 +529,7 @@
 			(void *)(unsigned long)dev->agp_buffer_map->offset;
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (!dev_priv->is_pci)
 		dev_priv->cce_buffers_offset = dev->agp->base;
 	else
@@ -552,7 +552,7 @@
 	dev_priv->sarea_priv->last_dispatch = 0;
 	R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch);
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->is_pci) {
 #endif
 		dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
@@ -568,7 +568,7 @@
 			return -ENOMEM;
 		}
 		R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	}
 #endif
 
@@ -600,7 +600,7 @@
 	if (dev->dev_private) {
 		drm_r128_private_t *dev_priv = dev->dev_private;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		if (!dev_priv->is_pci) {
 			if (dev_priv->cce_ring != NULL)
 				drm_legacy_ioremapfree(dev_priv->cce_ring, dev);
diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index 98f9ada..e231eea 100644
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -1837,7 +1837,7 @@
 	SET_RING_HEAD(dev_priv, 0);
 	dev_priv->ring.tail = 0;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		rptr_addr = dev_priv->ring_rptr->offset
 			- dev->agp->base +
@@ -1863,7 +1863,7 @@
 		     dev_priv->ring.size_l2qw);
 #endif
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		/* XXX */
 		radeon_write_agp_base(dev_priv, dev->agp->base);
@@ -1946,7 +1946,7 @@
 	if (dev->irq_enabled)
 		drm_irq_uninstall(dev);
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		if (dev_priv->cp_ring != NULL) {
 			drm_legacy_ioremapfree(dev_priv->cp_ring, dev);
@@ -2089,7 +2089,7 @@
 		}
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	/* XXX */
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		drm_legacy_ioremap_wc(dev_priv->cp_ring, dev);
@@ -2148,7 +2148,7 @@
 		 * location in the card and on the bus, though we have to
 		 * align it down.
 		 */
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		/* XXX */
 		if (dev_priv->flags & RADEON_IS_AGP) {
 			base = dev->agp->base;
@@ -2175,7 +2175,7 @@
 				 base, dev_priv->gart_vm_start);
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	/* XXX */
 	if (dev_priv->flags & RADEON_IS_AGP)
 		dev_priv->gart_buffers_offset = (dev->agp_buffer_map->offset
@@ -2212,7 +2212,7 @@
 
 	dev_priv->ring.high_mark = RADEON_RING_HIGH_MARK;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		/* XXX turn off pcie gart */
 	} else
diff --git a/drivers/gpu/drm/radeon/radeon_agp.c b/drivers/gpu/drm/radeon/radeon_agp.c
index a9297b2..fe994aa 100644
--- a/drivers/gpu/drm/radeon/radeon_agp.c
+++ b/drivers/gpu/drm/radeon/radeon_agp.c
@@ -28,7 +28,7 @@
 #include "radeon.h"
 #include <drm/radeon_drm.h>
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 
 struct radeon_agpmode_quirk {
 	u32 hostbridge_vendor;
@@ -123,7 +123,7 @@
 
 int radeon_agp_init(struct radeon_device *rdev)
 {
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	struct radeon_agpmode_quirk *p = radeon_agpmode_quirk_list;
 	struct drm_agp_mode mode;
 	struct drm_agp_info info;
@@ -257,7 +257,7 @@
 
 void radeon_agp_resume(struct radeon_device *rdev)
 {
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	int r;
 	if (rdev->flags & RADEON_IS_AGP) {
 		r = radeon_agp_init(rdev);
@@ -269,7 +269,7 @@
 
 void radeon_agp_fini(struct radeon_device *rdev)
 {
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (rdev->ddev->agp && rdev->ddev->agp->acquired) {
 		drm_agp_release(rdev->ddev);
 	}
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index ea134a7..500287e 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -762,7 +762,7 @@
 			     ((dev_priv->gart_vm_start - 1) & 0xffff0000)
 			     | (dev_priv->fb_location >> 16));
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		radeon_write_agp_base(dev_priv, dev->agp->base);
 
@@ -791,7 +791,7 @@
 	SET_RING_HEAD(dev_priv, cur_read_ptr);
 	dev_priv->ring.tail = cur_read_ptr;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		RADEON_WRITE(RADEON_CP_RB_RPTR_ADDR,
 			     dev_priv->ring_rptr->offset
@@ -1335,7 +1335,7 @@
 		}
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		drm_legacy_ioremap_wc(dev_priv->cp_ring, dev);
 		drm_legacy_ioremap_wc(dev_priv->ring_rptr, dev);
@@ -1394,7 +1394,7 @@
 		 * location in the card and on the bus, though we have to
 		 * align it down.
 		 */
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		if (dev_priv->flags & RADEON_IS_AGP) {
 			base = dev->agp->base;
 			/* Check if valid */
@@ -1424,7 +1424,7 @@
 			RADEON_READ(RADEON_CONFIG_APER_SIZE);
 	}
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP)
 		dev_priv->gart_buffers_offset = (dev->agp_buffer_map->offset
 						 - dev->agp->base
@@ -1455,7 +1455,7 @@
 
 	dev_priv->ring.high_mark = RADEON_RING_HIGH_MARK;
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		/* Turn off PCI GART */
 		radeon_set_pcigart(dev_priv, 0);
@@ -1566,7 +1566,7 @@
 	if (dev->irq_enabled)
 		drm_irq_uninstall(dev);
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		if (dev_priv->cp_ring != NULL) {
 			drm_legacy_ioremapfree(dev_priv->cp_ring, dev);
@@ -1625,7 +1625,7 @@
 
 	DRM_DEBUG("Starting radeon_do_resume_cp()\n");
 
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (dev_priv->flags & RADEON_IS_AGP) {
 		/* Turn off PCI GART */
 		radeon_set_pcigart(dev_priv, 0);
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 06ac59f..e343074 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -144,7 +144,7 @@
 		man->available_caching = TTM_PL_MASK_CACHING;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE | TTM_MEMTYPE_FLAG_CMA;
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		if (rdev->flags & RADEON_IS_AGP) {
 			if (!rdev->ddev->agp) {
 				DRM_ERROR("AGP is not enabled for memory type %u\n",
@@ -461,7 +461,7 @@
 		/* system memory */
 		return 0;
 	case TTM_PL_TT:
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 		if (rdev->flags & RADEON_IS_AGP) {
 			/* RADEON_IS_AGP is set only if AGP is active */
 			mem->bus.offset = mem->start << PAGE_SHIFT;
@@ -680,7 +680,7 @@
 	struct radeon_ttm_tt *gtt;
 
 	rdev = radeon_get_rdev(bdev);
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (rdev->flags & RADEON_IS_AGP) {
 		return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
 					 size, page_flags, dummy_read_page);
@@ -736,7 +736,7 @@
 	}
 
 	rdev = radeon_get_rdev(ttm->bdev);
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (rdev->flags & RADEON_IS_AGP) {
 		return ttm_agp_tt_populate(ttm);
 	}
@@ -787,7 +787,7 @@
 		return;
 
 	rdev = radeon_get_rdev(ttm->bdev);
-#if __OS_HAS_AGP
+#if IS_ENABLED(CONFIG_AGP)
 	if (rdev->flags & RADEON_IS_AGP) {
 		ttm_agp_tt_unpopulate(ttm);
 		return;