RDMA/rtrs-clt: Replace list_next_or_null_rr_rcu with an inline function
removes list_next_or_null_rr_rcu macro to fix below warnings.
That macro is used only twice.
CHECK:MACRO_ARG_REUSE: Macro argument reuse 'head' - possible side-effects?
CHECK:MACRO_ARG_REUSE: Macro argument reuse 'ptr' - possible side-effects?
CHECK:MACRO_ARG_REUSE: Macro argument reuse 'memb' - possible side-effects?
Replaces that macro with an inline function.
Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality")
Cc: jinpu.wang@ionos.com
Link: https://lore.kernel.org/r/20220712103113.617754-5-haris.iqbal@ionos.com
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index 8441f09..baecde4 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -740,25 +740,25 @@ struct path_it {
struct rtrs_clt_path *(*next_path)(struct path_it *it);
};
-/**
- * list_next_or_null_rr_rcu - get next list element in round-robin fashion.
+/*
+ * rtrs_clt_get_next_path_or_null - get clt path from the list or return NULL
* @head: the head for the list.
- * @ptr: the list head to take the next element from.
- * @type: the type of the struct this is embedded in.
- * @memb: the name of the list_head within the struct.
+ * @clt_path: The element to take the next clt_path from.
*
- * Next element returned in round-robin fashion, i.e. head will be skipped,
+ * Next clt path returned in round-robin fashion, i.e. head will be skipped,
* but if list is observed as empty, NULL will be returned.
*
- * This primitive may safely run concurrently with the _rcu list-mutation
+ * This function may safely run concurrently with the _rcu list-mutation
* primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock().
*/
-#define list_next_or_null_rr_rcu(head, ptr, type, memb) \
-({ \
- list_next_or_null_rcu(head, ptr, type, memb) ?: \
- list_next_or_null_rcu(head, READ_ONCE((ptr)->next), \
- type, memb); \
-})
+static inline struct rtrs_clt_path *
+rtrs_clt_get_next_path_or_null(struct list_head *head, struct rtrs_clt_path *clt_path)
+{
+ return list_next_or_null_rcu(head, &clt_path->s.entry, typeof(*clt_path), s.entry) ?:
+ list_next_or_null_rcu(head,
+ READ_ONCE((&clt_path->s.entry)->next),
+ typeof(*clt_path), s.entry);
+}
/**
* get_next_path_rr() - Returns path in round-robin fashion.
@@ -789,10 +789,8 @@ static struct rtrs_clt_path *get_next_path_rr(struct path_it *it)
path = list_first_or_null_rcu(&clt->paths_list,
typeof(*path), s.entry);
else
- path = list_next_or_null_rr_rcu(&clt->paths_list,
- &path->s.entry,
- typeof(*path),
- s.entry);
+ path = rtrs_clt_get_next_path_or_null(&clt->paths_list, path);
+
rcu_assign_pointer(*ppcpu_path, path);
return path;
@@ -2274,8 +2272,7 @@ static void rtrs_clt_remove_path_from_arr(struct rtrs_clt_path *clt_path)
* removed. If @sess is the last element, then @next is NULL.
*/
rcu_read_lock();
- next = list_next_or_null_rr_rcu(&clt->paths_list, &clt_path->s.entry,
- typeof(*next), s.entry);
+ next = rtrs_clt_get_next_path_or_null(&clt->paths_list, clt_path);
rcu_read_unlock();
/*
