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rhashtable: Move hash_rnd into bucket_table

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Currently hash_rnd is a parameter that users can set.  However,
no existing users set this parameter.  It is also something that
people are unlikely to want to set directly since it's just a
random number.

In preparation for allowing the reseeding/rehashing of rhashtable,
this patch moves hash_rnd into bucket_table so that it's now an
internal state rather than a parameter.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2015-03-10 09:27:55 +11:00 • committed by David S. Miller
parent 0ddcf43d5d
commit 988dfbd795
2 changed files with 17 additions and 11 deletions
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4
include/linux/rhashtable.h
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@ -49,12 +49,14 @@ struct rhash_head {
/**
* struct bucket_table - Table of hash buckets
* @size: Number of hash buckets
* @hash_rnd: Random seed to fold into hash
* @locks_mask: Mask to apply before accessing locks[]
* @locks: Array of spinlocks protecting individual buckets
* @buckets: size * hash buckets
*/
struct bucket_table {
size_t size;
u32 hash_rnd;
unsigned int locks_mask;
spinlock_t *locks;
@ -72,7 +74,6 @@ struct rhashtable;
* @key_len: Length of key
* @key_offset: Offset of key in struct to be hashed
* @head_offset: Offset of rhash_head in struct to be hashed
* @hash_rnd: Seed to use while hashing
* @max_shift: Maximum number of shifts while expanding
* @min_shift: Minimum number of shifts while shrinking
* @nulls_base: Base value to generate nulls marker
@ -85,7 +86,6 @@ struct rhashtable_params {
size_t key_len;
size_t key_offset;
size_t head_offset;
u32 hash_rnd;
size_t max_shift;
size_t min_shift;
u32 nulls_base;