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drm: Document that drm_dev_alloc doesn't need a parent

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Possible for purely virtual debug devices.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2014-11-24 20:01:58 +01:00
parent 955289c7cf
commit b0ff4b93f6
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/drm_drv.c
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@ -535,6 +535,8 @@ static void drm_fs_inode_free(struct inode *inode)
* The initial ref-count of the object is 1. Use drm_dev_ref() and
* drm_dev_unref() to take and drop further ref-counts.
*
* Note that for purely virtual devices @parent can be NULL.
*
* RETURNS:
* Pointer to new DRM device, or NULL if out of memory.
*/