[PATCH 2/2] ipc/sem: Convert to use built-in RCU list checking

[Joel Fernandes (Google)]

CONFIG_PROVE_RCU_LIST requires list_for_each_entry_rcu() to pass a
lockdep expression if using srcu or locking for protection. It can only
check regular RCU protection, all other protection needs to be passed as
lockdep expression.

Signed-off-by: Joel Fernandes (Google) <j...@joelfernandes.org>
---
 ipc/sem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ipc/sem.c b/ipc/sem.c
index 7da4504bcc7c..ec97a7072413 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1852,7 +1852,8 @@ static struct sem_undo *__lookup_undo(struct 
sem_undo_list *ulp, int semid)
 {
        struct sem_undo *un;
 
-       list_for_each_entry_rcu(un, &ulp->list_proc, list_proc) {
+       list_for_each_entry_rcu(un, &ulp->list_proc, list_proc,
+                               spin_is_locked(&ulp->lock)) {
                if (un->semid == semid)
                        return un;
        }
-- 
2.23.0.187.g17f5b7556c-goog