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drm: Remove obsolete "This is gross" comment

PATCH Superseded Haneen Mohammed 1 participant 1 message Sep 21, 2017

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v1 of 2 Superseded Latest is v2 →

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PATCH 1/1 drm: Remove obsolete "This is gross" comment

Remove obsolete comment which was initially added in 2008 to annotate that idr_find() was used before idr_remove() since idr_remove() didn't use to return feedback. The comment now is irrelevant with commit f6cd7daecff5 ("drm: Release driver references to handle before making it available again").

---
 drivers/gpu/drm/drm_gem.c | 9 ---------
 1 file changed, 9 deletions(-)
drivers/gpu/drm/drm_gem.c +0 -9
index c55f338..b9bddaa 100644
@@ -282,15 +282,6 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
 {
 	struct drm_gem_object *obj;
 
-	/* This is gross. The idr system doesn't let us try a delete and
-	 * return an error code.  It just spews if you fail at deleting.
-	 * So, we have to grab a lock around finding the object and then
-	 * doing the delete on it and dropping the refcount, or the user
-	 * could race us to double-decrement the refcount and cause a
-	 * use-after-free later.  Given the frequency of our handle lookups,
-	 * we may want to use ida for number allocation and a hash table
-	 * for the pointers, anyway.
-	 */
 	spin_lock(&filp->table_lock);
 
 	/* Check if we currently have a reference on the object */
Signature · 1 line
2.7.4