Commit-ID: e3ac79e087ffe8a1f953ed44a74acf7616cb0b25 Gitweb: http://git.kernel.org/tip/e3ac79e087ffe8a1f953ed44a74acf7616cb0b25 Author: Thomas Gleixner <[email protected]> AuthorDate: Tue, 7 Jul 2015 16:38:11 +0200 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 7 Jul 2015 18:46:47 +0200
tick/broadcast: Move the check for periodic mode inside state handling We need to check more than the periodic mode for proper operation in all runtime combinations. To avoid code duplication move the check into the enter state handling. No functional change. [ Split out from a larger combo patch ] Reported-and-tested-by: Sudeep Holla <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Suzuki Poulose <[email protected]> Cc: Lorenzo Pieralisi <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Rafael J. Wysocki <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Preeti U Murthy <[email protected]> Cc: Ingo Molnar <[email protected]> Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1507070929360.3916@nanos --- kernel/time/tick-broadcast.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index fad3f78..83aa92e 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -688,7 +688,6 @@ static void broadcast_shutdown_local(struct clock_event_device *bc, int __tick_broadcast_oneshot_control(enum tick_broadcast_state state) { struct clock_event_device *bc, *dev; - struct tick_device *td; int cpu, ret = 0; ktime_t now; @@ -699,25 +698,20 @@ int __tick_broadcast_oneshot_control(enum tick_broadcast_state state) if (!tick_broadcast_device.evtdev) return -EBUSY; - /* - * Periodic mode does not care about the enter/exit of power - * states - */ - if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC) - return 0; - - /* - * We are called with preemtion disabled from the depth of the - * idle code, so we can't be moved away. - */ - td = this_cpu_ptr(&tick_cpu_device); - dev = td->evtdev; + dev = this_cpu_ptr(&tick_cpu_device)->evtdev; raw_spin_lock(&tick_broadcast_lock); bc = tick_broadcast_device.evtdev; cpu = smp_processor_id(); if (state == TICK_BROADCAST_ENTER) { + /* + * If the broadcast device is in periodic mode, we + * return. + */ + if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC) + goto out; + if (!cpumask_test_and_set_cpu(cpu, tick_broadcast_oneshot_mask)) { WARN_ON_ONCE(cpumask_test_cpu(cpu, tick_broadcast_pending_mask)); broadcast_shutdown_local(bc, dev); -- 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/
