drm: Add support for tracking drawable information to core

Actually make the existing ioctls for adding and removing drawables do
something useful, and add another ioctl for the X server to update drawable
information. The only kind of drawable information tracked so far is cliprects.

Only reallocate cliprect memory if the number of cliprects changes.
Also improve diagnostic output.

hook up drm ioctl update draw
export drm_get_drawable_info symbol

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_stub.c b/drivers/char/drm/drm_stub.c
index 7b1d4e8659ba..6f748e194cf9 100644
--- a/drivers/char/drm/drm_stub.c
+++ b/drivers/char/drm/drm_stub.c
@@ -60,6 +60,7 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
         int retcode;
 
         spin_lock_init(&dev->count_lock);
+        spin_lock_init(&dev->drw_lock);
         init_timer(&dev->timer);
         mutex_init(&dev->struct_mutex);
         mutex_init(&dev->ctxlist_mutex);