drm: Remove the drm_mapbufs() function

It's not used by vmwgfx anyway, and it contains calls to do_mmap() which
has been removed from recent kernels.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>

1 files changed, 0 insertions, 105 deletions

diff --git a/drm_bufs.c b/drm_bufs.c
index bfd0c8d..949f172 100644
--- a/drm_bufs.c
+++ b/drm_bufs.c
@@ -1487,111 +1487,6 @@ int drm_freebufs(struct drm_device *dev, void *data,
 }
 
 /**
- * Maps all of the DMA buffers into client-virtual space (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls do_mmap() with
- * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
- * drm_mmap_dma().
- */
-int drm_mapbufs(struct drm_device *dev, void *data,
-	        struct drm_file *file_priv)
-{
-	struct drm_device_dma *dma = dev->dma;
-	int retcode = 0;
-	const int zero = 0;
-	unsigned long virtual;
-	unsigned long address;
-	struct drm_buf_map *request = data;
-	int i;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EINVAL;
-
-	if (!dma)
-		return -EINVAL;
-
-	spin_lock(&dev->count_lock);
-	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->count_lock);
-		return -EBUSY;
-	}
-	dev->buf_use++;		/* Can't allocate more after this call */
-	spin_unlock(&dev->count_lock);
-
-	if (request->count >= dma->buf_count) {
-		if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP))
-		    || (drm_core_check_feature(dev, DRIVER_SG)
-			&& (dma->flags & _DRM_DMA_USE_SG))
-		    || (drm_core_check_feature(dev, DRIVER_FB_DMA)
-			&& (dma->flags & _DRM_DMA_USE_FB))) {
-			struct drm_local_map *map = dev->agp_buffer_map;
-			unsigned long token = dev->agp_buffer_token;
-
-			if (!map) {
-				retcode = -EINVAL;
-				goto done;
-			}
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(file_priv->filp, 0, map->size,
-					  PROT_READ | PROT_WRITE,
-					  MAP_SHARED,
-					  token);
-			up_write(&current->mm->mmap_sem);
-		} else {
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(file_priv->filp, 0, dma->byte_count,
-					  PROT_READ | PROT_WRITE,
-					  MAP_SHARED, 0);
-			up_write(&current->mm->mmap_sem);
-		}
-		if (virtual > -1024UL) {
-			/* Real error */
-			retcode = (signed long)virtual;
-			goto done;
-		}
-		request->virtual = (void __user *)virtual;
-
-		for (i = 0; i < dma->buf_count; i++) {
-			if (copy_to_user(&request->list[i].idx,
-					 &dma->buflist[i]->idx,
-					 sizeof(request->list[0].idx))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			if (copy_to_user(&request->list[i].total,
-					 &dma->buflist[i]->total,
-					 sizeof(request->list[0].total))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			if (copy_to_user(&request->list[i].used,
-					 &zero, sizeof(zero))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-			address = virtual + dma->buflist[i]->offset;	/* *** */
-			if (copy_to_user(&request->list[i].address,
-					 &address, sizeof(address))) {
-				retcode = -EFAULT;
-				goto done;
-			}
-		}
-	}
-      done:
-	request->count = dma->buf_count;
-	DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode);
-
-	return retcode;
-}
-
-/**
  * Compute size order.  Returns the exponent of the smaller power of two which
  * is greater or equal to given number.
  *