Commit-ID: f0cf16cbd0659d2dd21352da9f06f3fab7a51596 Gitweb: http://git.kernel.org/tip/f0cf16cbd0659d2dd21352da9f06f3fab7a51596 Author: Oleg Nesterov <[email protected]> AuthorDate: Fri, 9 Oct 2015 18:00:51 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 20 Oct 2015 10:23:56 +0200
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 <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/stop_machine.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c index 59096a5..e5a09d2 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, }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
