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-rw-r--r--include/linux/rhashtable.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 89d102270570..3851952781d7 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -199,8 +199,12 @@ static inline unsigned int rht_key_hashfn(
struct rhashtable *ht, const struct bucket_table *tbl,
const void *key, const struct rhashtable_params params)
{
- return rht_bucket_index(tbl, params.hashfn(key, params.key_len ?:
- ht->p.key_len,
+ /* params must be equal to ht->p if it isn't constant. */
+ unsigned key_len = __builtin_constant_p(params.key_len) ?
+ (params.key_len ?: ht->p.key_len) :
+ params.key_len;
+
+ return rht_bucket_index(tbl, params.hashfn(key, key_len,
tbl->hash_rnd));
}