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rhashtable: Move mutex_is_held under PROVE_LOCKING 

The rhashtable function mutex_is_held is only used when PROVE_LOCKING
is enabled.  This patch makes the mutex_is_held field in rhashtable
optional depending on PROVE_LOCKING.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Herbert Xu 2014-11-13 18:11:20 +08:00 committed by David S. Miller
parent 1f501d6252
commit 1b2f309d70
2 changed files with 10 additions and 0 deletions
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2
include/linux/rhashtable.h
View File

@ -65,7 +65,9 @@ struct rhashtable_params {
size_t new_size);
bool (*shrink_decision)(const struct rhashtable *ht,
size_t new_size);
#ifdef CONFIG_PROVE_LOCKING
int (*mutex_is_held)(void);
#endif
};
/**

8
lib/rhashtable.c
View File

@ -532,7 +532,9 @@ static size_t rounded_hashtable_size(struct rhashtable_params *params)
* .key_offset = offsetof(struct test_obj, key),
* .key_len = sizeof(int),
* .hashfn = arch_fast_hash,
* #ifdef CONFIG_PROVE_LOCKING
* .mutex_is_held = &my_mutex_is_held,
* #endif
* };
*
* Configuration Example 2: Variable length keys
@ -552,7 +554,9 @@ static size_t rounded_hashtable_size(struct rhashtable_params *params)
* .head_offset = offsetof(struct test_obj, node),
* .hashfn = arch_fast_hash,
* .obj_hashfn = my_hash_fn,
* #ifdef CONFIG_PROVE_LOCKING
* .mutex_is_held = &my_mutex_is_held,
* #endif
* };
*/
int rhashtable_init(struct rhashtable *ht, struct rhashtable_params *params)
@ -613,10 +617,12 @@ EXPORT_SYMBOL_GPL(rhashtable_destroy);
#define TEST_PTR ((void *) 0xdeadbeef)
#define TEST_NEXPANDS 4
#ifdef CONFIG_PROVE_LOCKING
static int test_mutex_is_held(void)
{
return 1;
}
#endif
struct test_obj {
void *ptr;
@ -767,7 +773,9 @@ static int __init test_rht_init(void)
.key_offset = offsetof(struct test_obj, value),
.key_len = sizeof(int),
.hashfn = arch_fast_hash,
#ifdef CONFIG_PROVE_LOCKING
.mutex_is_held = &test_mutex_is_held,
#endif
.grow_decision = rht_grow_above_75,
.shrink_decision = rht_shrink_below_30,
};