diff options
| -rw-r--r-- | ipc/sem.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index b93b561842c..d61362b31f1 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -109,6 +109,7 @@ struct sem_queue { int pid; /* process id of requesting process */ int status; /* completion status of operation */ struct sembuf *sops; /* array of pending operations */ + struct sembuf *blocking; /* the operation that blocked */ int nsops; /* number of operations */ int alter; /* does *sops alter the array? */ }; @@ -642,6 +643,8 @@ out_of_range: goto undo; would_block: + q->blocking = sop; + if (sop->sem_flg & IPC_NOWAIT) result = -EAGAIN; else |