diff options
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_page_alloc_dma.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c index b8b394319b45..de1a753b1d56 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c @@ -1006,9 +1006,9 @@ EXPORT_SYMBOL_GPL(ttm_dma_unpopulate); static int ttm_dma_pool_mm_shrink(struct shrinker *shrink, struct shrink_control *sc) { - static atomic_t start_pool = ATOMIC_INIT(0); + static unsigned start_pool; unsigned idx = 0; - unsigned pool_offset = atomic_add_return(1, &start_pool); + unsigned pool_offset; unsigned shrink_pages = sc->nr_to_scan; struct device_pools *p; @@ -1016,7 +1016,9 @@ static int ttm_dma_pool_mm_shrink(struct shrinker *shrink, return 0; mutex_lock(&_manager->lock); - pool_offset = pool_offset % _manager->npools; + if (!_manager->npools) + goto out; + pool_offset = ++start_pool % _manager->npools; list_for_each_entry(p, &_manager->pools, pools) { unsigned nr_free; @@ -1033,6 +1035,7 @@ static int ttm_dma_pool_mm_shrink(struct shrinker *shrink, p->pool->dev_name, p->pool->name, current->pid, nr_free, shrink_pages); } +out: mutex_unlock(&_manager->lock); /* return estimated number of unused pages in pool */ return ttm_dma_pool_get_num_unused_pages(); |