diff options
| -rw-r--r-- | sys/kern/sysv_sem.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sys/kern/sysv_sem.c b/sys/kern/sysv_sem.c index ed7f2c4..0a7e58b 100644 --- a/sys/kern/sysv_sem.c +++ b/sys/kern/sysv_sem.c @@ -878,7 +878,7 @@ semop(td, uap) struct sem *semptr = 0; struct sem_undo *suptr; struct mtx *sema_mtxp; - size_t i, j; + size_t i, j, k; int error; int do_wakeup, do_undos; @@ -1086,14 +1086,15 @@ done: * we applied them. This guarantees that we won't run * out of space as we roll things back out. */ - for (j = i - 1; j >= 0; j--) { - if ((sops[j].sem_flg & SEM_UNDO) == 0) + for (j = 0; j < i; j++) { + k = i - j - 1; + if ((sops[k].sem_flg & SEM_UNDO) == 0) continue; - adjval = sops[j].sem_op; + adjval = sops[k].sem_op; if (adjval == 0) continue; if (semundo_adjust(td, &suptr, semid, - sops[j].sem_num, adjval) != 0) + sops[k].sem_num, adjval) != 0) panic("semop - can't undo undos"); } |
