diff options
Diffstat (limited to 'fs/ioprio.c')
| -rw-r--r-- | fs/ioprio.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ioprio.c b/fs/ioprio.c index 7da2a06..95a6c2b 100644 --- a/fs/ioprio.c +++ b/fs/ioprio.c @@ -30,7 +30,7 @@ int set_task_ioprio(struct task_struct *task, int ioprio) { - int err; + int err, i; struct io_context *ioc; const struct cred *cred = current_cred(), *tcred; @@ -60,12 +60,17 @@ int set_task_ioprio(struct task_struct *task, int ioprio) err = -ENOMEM; break; } + /* let other ioc users see the new values */ + smp_wmb(); task->io_context = ioc; } while (1); if (!err) { ioc->ioprio = ioprio; - ioc->ioprio_changed = 1; + /* make sure schedulers see the new ioprio value */ + wmb(); + for (i = 0; i < IOC_IOPRIO_CHANGED_BITS; i++) + set_bit(i, ioc->ioprio_changed); } task_unlock(task); |