diff options
Diffstat (limited to 'lib/lru_cache.c')
-rw-r--r-- | lib/lru_cache.c | 59 |
1 files changed, 2 insertions, 57 deletions
diff --git a/lib/lru_cache.c b/lib/lru_cache.c index dc35464216d3..b3d9187611de 100644 --- a/lib/lru_cache.c +++ b/lib/lru_cache.c @@ -60,17 +60,6 @@ int lc_try_lock(struct lru_cache *lc) } while (unlikely (val == LC_PARANOIA)); /* Spin until no-one is inside a PARANOIA_ENTRY()/RETURN() section. */ return 0 == val; -#if 0 - /* Alternative approach, spin in case someone enters or leaves a - * PARANOIA_ENTRY()/RETURN() section. */ - unsigned long old, new, val; - do { - old = lc->flags & LC_PARANOIA; - new = old | LC_LOCKED; - val = cmpxchg(&lc->flags, old, new); - } while (unlikely (val == (old ^ LC_PARANOIA))); - return old == val; -#endif } /** @@ -364,7 +353,7 @@ static struct lc_element *__lc_get(struct lru_cache *lc, unsigned int enr, unsig struct lc_element *e; PARANOIA_ENTRY(); - if (lc->flags & LC_STARVING) { + if (test_bit(__LC_STARVING, &lc->flags)) { ++lc->starving; RETURN(NULL); } @@ -417,7 +406,7 @@ static struct lc_element *__lc_get(struct lru_cache *lc, unsigned int enr, unsig * the LRU element, we have to wait ... */ if (!lc_unused_element_available(lc)) { - __set_bit(__LC_STARVING, &lc->flags); + set_bit(__LC_STARVING, &lc->flags); RETURN(NULL); } @@ -586,48 +575,6 @@ struct lc_element *lc_element_by_index(struct lru_cache *lc, unsigned i) } /** - * lc_index_of - * @lc: the lru cache to operate on - * @e: the element to query for its index position in lc->element - */ -unsigned int lc_index_of(struct lru_cache *lc, struct lc_element *e) -{ - PARANOIA_LC_ELEMENT(lc, e); - return e->lc_index; -} - -/** - * lc_set - associate index with label - * @lc: the lru cache to operate on - * @enr: the label to set - * @index: the element index to associate label with. - * - * Used to initialize the active set to some previously recorded state. - */ -void lc_set(struct lru_cache *lc, unsigned int enr, int index) -{ - struct lc_element *e; - struct list_head *lh; - - if (index < 0 || index >= lc->nr_elements) - return; - - e = lc_element_by_index(lc, index); - BUG_ON(e->lc_number != e->lc_new_number); - BUG_ON(e->refcnt != 0); - - e->lc_number = e->lc_new_number = enr; - hlist_del_init(&e->colision); - if (enr == LC_FREE) - lh = &lc->free; - else { - hlist_add_head(&e->colision, lc_hash_slot(lc, enr)); - lh = &lc->lru; - } - list_move(&e->list, lh); -} - -/** * lc_seq_dump_details - Dump a complete LRU cache to seq in textual form. * @lc: the lru cache to operate on * @seq: the &struct seq_file pointer to seq_printf into @@ -661,7 +608,6 @@ void lc_seq_dump_details(struct seq_file *seq, struct lru_cache *lc, char *utext EXPORT_SYMBOL(lc_create); EXPORT_SYMBOL(lc_reset); EXPORT_SYMBOL(lc_destroy); -EXPORT_SYMBOL(lc_set); EXPORT_SYMBOL(lc_del); EXPORT_SYMBOL(lc_try_get); EXPORT_SYMBOL(lc_find); @@ -669,7 +615,6 @@ EXPORT_SYMBOL(lc_get); EXPORT_SYMBOL(lc_put); EXPORT_SYMBOL(lc_committed); EXPORT_SYMBOL(lc_element_by_index); -EXPORT_SYMBOL(lc_index_of); EXPORT_SYMBOL(lc_seq_printf_stats); EXPORT_SYMBOL(lc_seq_dump_details); EXPORT_SYMBOL(lc_try_lock); |