diff options
author | Neil Zhang <zhangwm@marvell.com> | 2013-04-11 21:04:59 +0800 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2013-05-28 09:40:22 +0200 |
commit | c5405a495e88d93cf9b4f4cc91507c7f4afcb901 (patch) | |
tree | c0d33303fb9162c610c5a0f0bc108f746d1e1b69 /kernel/sched/rt.c | |
parent | 41261b6a832ea0e788627f6a8707854423f9ff49 (diff) | |
download | linux-c5405a495e88d93cf9b4f4cc91507c7f4afcb901.tar.bz2 |
sched: Remove redundant update_runtime notifier
migration_call() will do all the things that update_runtime() does.
So let's remove it.
Furthermore, there is potential risk that the current code will catch
BUG_ON at line 689 of rt.c when do cpu hotplug while there are realtime
threads running because of enabling runtime twice while the rt_runtime
may already changed.
Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1365685499-26515-1-git-send-email-zhangwm@marvell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/rt.c')
-rw-r--r-- | kernel/sched/rt.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 7aced2e3b085..8853ab17b750 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -699,15 +699,6 @@ balanced: } } -static void disable_runtime(struct rq *rq) -{ - unsigned long flags; - - raw_spin_lock_irqsave(&rq->lock, flags); - __disable_runtime(rq); - raw_spin_unlock_irqrestore(&rq->lock, flags); -} - static void __enable_runtime(struct rq *rq) { rt_rq_iter_t iter; @@ -732,37 +723,6 @@ static void __enable_runtime(struct rq *rq) } } -static void enable_runtime(struct rq *rq) -{ - unsigned long flags; - - raw_spin_lock_irqsave(&rq->lock, flags); - __enable_runtime(rq); - raw_spin_unlock_irqrestore(&rq->lock, flags); -} - -int update_runtime(struct notifier_block *nfb, unsigned long action, void *hcpu) -{ - int cpu = (int)(long)hcpu; - - switch (action) { - case CPU_DOWN_PREPARE: - case CPU_DOWN_PREPARE_FROZEN: - disable_runtime(cpu_rq(cpu)); - return NOTIFY_OK; - - case CPU_DOWN_FAILED: - case CPU_DOWN_FAILED_FROZEN: - case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - enable_runtime(cpu_rq(cpu)); - return NOTIFY_OK; - - default: - return NOTIFY_DONE; - } -} - static int balance_runtime(struct rt_rq *rt_rq) { int more = 0; |