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| author | Ingo Molnar <mingo@kernel.org> | 2019-09-16 14:04:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-09-16 14:05:04 +0200 |
| commit | 563c4f85f9f0d63b712081d5b4522152cdcb8b6b (patch) | |
| tree | 92351ab2d60d5fd7ce5745d21c9a60ce6d46c5dd /drivers/tty/tty_ldsem.c | |
| parent | 4adcdcea717cb2d8436bef00dd689aa5bc76f11b (diff) | |
| parent | 09c7e8b21d67c3c78ab9701dbc0fb1e9f14a0ba5 (diff) | |
| download | blackbird-op-linux-563c4f85f9f0d63b712081d5b4522152cdcb8b6b.tar.gz blackbird-op-linux-563c4f85f9f0d63b712081d5b4522152cdcb8b6b.zip | |
Merge branch 'sched/rt' into sched/core, to pick up -rt changes
Pick up the first couple of patches working towards PREEMPT_RT.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/tty/tty_ldsem.c')
| -rw-r--r-- | drivers/tty/tty_ldsem.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c index 717292c1c0df..60ff236a3d63 100644 --- a/drivers/tty/tty_ldsem.c +++ b/drivers/tty/tty_ldsem.c @@ -93,8 +93,7 @@ static void __ldsem_wake_readers(struct ld_semaphore *sem) list_for_each_entry_safe(waiter, next, &sem->read_wait, list) { tsk = waiter->task; - smp_mb(); - waiter->task = NULL; + smp_store_release(&waiter->task, NULL); wake_up_process(tsk); put_task_struct(tsk); } @@ -194,7 +193,7 @@ down_read_failed(struct ld_semaphore *sem, long count, long timeout) for (;;) { set_current_state(TASK_UNINTERRUPTIBLE); - if (!waiter.task) + if (!smp_load_acquire(&waiter.task)) break; if (!timeout) break; |
