lkml.org 
[lkml]   [2022]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v3 09/15] drm/gem: Add LRU/shrinker helper
From
On 7/26/22 20:50, Rob Clark wrote:
> +/**
> + * drm_gem_lru_move_tail_locked - move the object to the tail of the LRU
> + *
> + * If the object is already in this LRU it will be moved to the
> + * tail. Otherwise it will be removed from whichever other LRU
> + * it is in (if any) and moved into this LRU.
> + *
> + * Call with LRU lock held.
> + *
> + * @lru: The LRU to move the object into.
> + * @obj: The GEM object to move into this LRU
> + */
> +void
> +drm_gem_lru_move_tail_locked(struct drm_gem_lru *lru, struct drm_gem_object *obj)
> +{
> + lockdep_assert_held_once(lru->lock);
> +
> + if (obj->lru)
> + lru_remove(obj);

The obj->lru also needs to be locked if lru != obj->lru, isn't it? And
then we should add lockdep_assert_held_once(obj->lru->lock).

--
Best regards,
Dmitry

\
 
 \ /
  Last update: 2022-07-29 17:29    [W:0.109 / U:0.720 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site