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authorDavid Herrmann <dh.herrmann@gmail.com>2014-01-03 14:24:19 +0100
committerDavid Herrmann <dh.herrmann@gmail.com>2014-03-16 12:23:33 +0100
commit6796cb16c088905bf3af40548fda68c09e6f6ee5 (patch)
treed40162f17dad7b54ac63feaf62b7c84493556f5a /include/drm
parent31bbe16f6d88622d6731fa2cb4ab38d57d844ac1 (diff)
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drm: use anon-inode instead of relying on cdevs
DRM drivers share a common address_space across all character-devices of a single DRM device. This allows simple buffer eviction and mapping-control. However, DRM core currently waits for the first ->open() on any char-dev to mark the underlying inode as backing inode of the device. This delayed initialization causes ugly conditions all over the place: if (dev->dev_mapping) do_sth(); To avoid delayed initialization and to stop reusing the inode of the char-dev, we allocate an anonymous inode for each DRM device and reset filp->f_mapping to it on ->open(). Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drmP.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 04a7f31301f8..3227b716ffdf 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1183,7 +1183,7 @@ struct drm_device {
struct drm_sg_mem *sg; /**< Scatter gather memory */
unsigned int num_crtcs; /**< Number of CRTCs on this device */
void *dev_private; /**< device private data */
- struct address_space *dev_mapping;
+ struct inode *anon_inode;
struct drm_sigdata sigdata; /**< For block_all_signals */
sigset_t sigmask;