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rhashtable: Move future_tbl into struct bucket_table

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This patch moves future_tbl to open up the possibility of having
multiple rehashes on the same table.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2015-03-14 13:57:25 +11:00 • committed by David S. Miller
parent 63d512d0cf
commit c4db8848af
2 changed files with 14 additions and 18 deletions
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5
include/linux/rhashtable.h
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@ -56,6 +56,7 @@ struct rhash_head {
* @locks: Array of spinlocks protecting individual buckets
* @walkers: List of active walkers
* @rcu: RCU structure for freeing the table
* @future_tbl: Table under construction during rehashing
* @buckets: size * hash buckets
*/
struct bucket_table {
@ -68,6 +69,8 @@ struct bucket_table {
struct list_head walkers;
struct rcu_head rcu;
struct bucket_table __rcu *future_tbl;
struct rhash_head __rcu *buckets[] ____cacheline_aligned_in_smp;
};
@ -105,7 +108,6 @@ struct rhashtable_params {
/**
* struct rhashtable - Hash table handle
* @tbl: Bucket table
* @future_tbl: Table under construction during expansion/shrinking
* @nelems: Number of elements in table
* @p: Configuration parameters
* @run_work: Deferred worker to expand/shrink asynchronously
@ -114,7 +116,6 @@ struct rhashtable_params {
*/
struct rhashtable {
struct bucket_table __rcu *tbl;
struct bucket_table __rcu *future_tbl;
atomic_t nelems;
bool being_destroyed;
struct rhashtable_params p;