quota: Cleanup list iteration in dqcache_shrink_scan()
Use list_first_entry() and list_empty() instead of opencoded variants. Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Jan Kara <jack@suse.cz>
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@ -711,21 +711,18 @@ EXPORT_SYMBOL(dquot_quota_sync);
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static unsigned long
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dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
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{
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struct list_head *head;
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struct dquot *dquot;
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unsigned long freed = 0;
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spin_lock(&dq_list_lock);
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head = free_dquots.next;
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while (head != &free_dquots && sc->nr_to_scan) {
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dquot = list_entry(head, struct dquot, dq_free);
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while (!list_empty(&free_dquots) && sc->nr_to_scan) {
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dquot = list_first_entry(&free_dquots, struct dquot, dq_free);
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remove_dquot_hash(dquot);
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remove_free_dquot(dquot);
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remove_inuse(dquot);
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do_destroy_dquot(dquot);
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sc->nr_to_scan--;
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freed++;
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head = free_dquots.next;
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}
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spin_unlock(&dq_list_lock);
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return freed;
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