diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/genalloc.c | 1 | ||||
| -rw-r--r-- | lib/percpu-refcount.c | 16 | ||||
| -rw-r--r-- | lib/rhashtable.c | 9 |
3 files changed, 21 insertions, 5 deletions
diff --git a/lib/genalloc.c b/lib/genalloc.c index bdb9a456bcbb..38d2db82228c 100644 --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -588,6 +588,7 @@ struct gen_pool *of_get_named_gen_pool(struct device_node *np, if (!np_pool) return NULL; pdev = of_find_device_by_node(np_pool); + of_node_put(np_pool); if (!pdev) return NULL; return dev_get_gen_pool(&pdev->dev); diff --git a/lib/percpu-refcount.c b/lib/percpu-refcount.c index fe5a3342e960..a89cf09a8268 100644 --- a/lib/percpu-refcount.c +++ b/lib/percpu-refcount.c @@ -184,3 +184,19 @@ void percpu_ref_kill_and_confirm(struct percpu_ref *ref, call_rcu_sched(&ref->rcu, percpu_ref_kill_rcu); } EXPORT_SYMBOL_GPL(percpu_ref_kill_and_confirm); + +/* + * XXX: Temporary kludge to work around SCSI blk-mq stall. Used only by + * block/blk-mq.c::blk_mq_freeze_queue(). Will be removed during v3.18 + * devel cycle. Do not use anywhere else. + */ +void __percpu_ref_kill_expedited(struct percpu_ref *ref) +{ + WARN_ONCE(ref->pcpu_count_ptr & PCPU_REF_DEAD, + "percpu_ref_kill() called more than once on %pf!", + ref->release); + + ref->pcpu_count_ptr |= PCPU_REF_DEAD; + synchronize_sched_expedited(); + percpu_ref_kill_rcu(&ref->rcu); +} diff --git a/lib/rhashtable.c b/lib/rhashtable.c index a2c78810ebc1..16d02639d334 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -23,7 +23,6 @@ #include <linux/hash.h> #include <linux/random.h> #include <linux/rhashtable.h> -#include <linux/log2.h> #define HASH_DEFAULT_SIZE 64UL #define HASH_MIN_SIZE 4UL @@ -589,13 +588,13 @@ EXPORT_SYMBOL_GPL(rhashtable_init); * rhashtable_destroy - destroy hash table * @ht: the hash table to destroy * - * Frees the bucket array. + * Frees the bucket array. This function is not rcu safe, therefore the caller + * has to make sure that no resizing may happen by unpublishing the hashtable + * and waiting for the quiescent cycle before releasing the bucket array. */ void rhashtable_destroy(const struct rhashtable *ht) { - const struct bucket_table *tbl = rht_dereference(ht->tbl, ht); - - bucket_table_free(tbl); + bucket_table_free(ht->tbl); } EXPORT_SYMBOL_GPL(rhashtable_destroy); |
