diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2015-10-09 18:00:51 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-20 10:23:56 +0200 |
| commit | f0cf16cbd0659d2dd21352da9f06f3fab7a51596 (patch) | |
| tree | 88579ea69b73ad79151c90878357f6480b9340fb /kernel/stop_machine.c | |
| parent | c00166d87e730088d919814020e96ffed129d0d1 (diff) | |
| download | lwn-f0cf16cbd0659d2dd21352da9f06f3fab7a51596.tar.gz lwn-f0cf16cbd0659d2dd21352da9f06f3fab7a51596.zip | |
stop_machine: Kill cpu_stop_threads->setup() and cpu_stop_unpark()
Now that we always use stop_machine_unpark() to wake the stopper
threas up, we can kill ->setup() and fold cpu_stop_unpark() into
stop_machine_unpark().
And we do not need stopper->lock to set stopper->enabled = true.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: heiko.carstens@de.ibm.com
Link: http://lkml.kernel.org/r/20151009160051.GA10169@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/stop_machine.c')
| -rw-r--r-- | kernel/stop_machine.c | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c index 59096a55089f..e5a09d2dc575 100644 --- a/kernel/stop_machine.c +++ b/kernel/stop_machine.c @@ -504,20 +504,11 @@ static void cpu_stop_park(unsigned int cpu) WARN_ON(!list_empty(&stopper->works)); } -static void cpu_stop_unpark(unsigned int cpu) -{ - struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu); - - spin_lock_irq(&stopper->lock); - stopper->enabled = true; - spin_unlock_irq(&stopper->lock); -} - void stop_machine_unpark(int cpu) { struct cpu_stopper *stopper = &per_cpu(cpu_stopper, cpu); - cpu_stop_unpark(cpu); + stopper->enabled = true; kthread_unpark(stopper->thread); } @@ -527,7 +518,6 @@ static struct smp_hotplug_thread cpu_stop_threads = { .thread_fn = cpu_stopper_thread, .thread_comm = "migration/%u", .create = cpu_stop_create, - .setup = cpu_stop_unpark, .park = cpu_stop_park, .selfparking = true, }; |