diff options
Diffstat (limited to 'backport-include/linux/rhashtable.h')
-rw-r--r-- | backport-include/linux/rhashtable.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/backport-include/linux/rhashtable.h b/backport-include/linux/rhashtable.h new file mode 100644 index 0000000..8e493bc --- /dev/null +++ b/backport-include/linux/rhashtable.h @@ -0,0 +1,31 @@ +#ifndef __BACKPORT_RHASHTABLE_H +#define __BACKPORT_RHASHTABLE_H +#include_next <linux/rhashtable.h> +#include <linux/version.h> + +#if LINUX_VERSION_IS_LESS(4,12,0) +/** + * rhashtable_lookup_get_insert_fast - lookup and insert object into hash table + * @ht: hash table + * @obj: pointer to hash head inside object + * @params: hash table parameters + * + * Just like rhashtable_lookup_insert_fast(), but this function returns the + * object if it exists, NULL if it did not and the insertion was successful, + * and an ERR_PTR otherwise. + */ +#define rhashtable_lookup_get_insert_fast LINUX_BACKPORT(rhashtable_lookup_get_insert_fast) +static inline void *rhashtable_lookup_get_insert_fast( + struct rhashtable *ht, struct rhash_head *obj, + const struct rhashtable_params params) +{ + const char *key = rht_obj(ht, obj); + + BUG_ON(ht->p.obj_hashfn); + + return __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, params, + false); +} +#endif + +#endif /* __BACKPORT_RHASHTABLE_H */ |