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|---|---|
| From | Thomas Gleixner <tglx@linutronix.de> |
| Newsgroups | linux.kernel |
| Subject | Re: [patch 10/20] cpu/hotplug: Make target state writeable |
| Date | Mon, 29 Feb 2016 17:00:03 +0100 |
| Message-ID | <r7yoP-4YQ-33@gated-at.bofh.it> (permalink) |
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| X-Original-To | "Rafael J. Wysocki" <rjw@rjwysocki.net> |
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| X-Original-Cc | LKML <linux-kernel@vger.kernel.org>, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Peter Anvin <hpa@zytor.com>, Oleg Nesterov <oleg@redhat.com>, linux-arch@vger.kernel.org, Tejun Heo <tj@kernel.org>, Steven Rostedt <rostedt@goodmis.org>, Rusty Russell <rusty@rustcorp.com.au>, Paul McKenney <paulmck@linux.vnet.ibm.com>, Rafael Wysocki <rafael.j.wysocki@intel.com>, Arjan van de Ven <arjan@linux.intel.com>, Rik van Riel <riel@redhat.com>, "Srivatsa S. Bhat" <srivatsa@mit.edu>, Sebastian Siewior <bigeasy@linutronix.de>, Paul Turner <pjt@google.com> |
| X-Original-Date | Mon, 29 Feb 2016 16:49:24 +0100 (CET) |
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| Xref | csiph.com linux.kernel:1345938 |
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On Sun, 28 Feb 2016, Thomas Gleixner wrote: > > Understood. I'll fix that thing up so that won't happen and I put it on the > list of things to look at deeper. The below delta patch should do what you need, right? Thanks, tglx 8<------------- --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1461,6 +1461,11 @@ static ssize_t write_cpuhp_target(struct if (target != CPUHP_OFFLINE && target != CPUHP_ONLINE) return -EINVAL; #endif + + ret = lock_device_hotplug_sysfs(); + if (ret) + return ret; + mutex_lock(&cpuhp_state_mutex); sp = cpuhp_get_step(target); ret = !sp->name || sp->cant_stop ? -EINVAL : 0; @@ -1472,6 +1477,8 @@ static ssize_t write_cpuhp_target(struct ret = do_cpu_up(dev->id, target); else ret = do_cpu_down(dev->id, target); + + unlock_device_hotplug(); return ret ? ret : count; }
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[patch 10/20] cpu/hotplug: Make target state writeable Thomas Gleixner <tglx@linutronix.de> - 2016-02-26 19:50 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-02-27 00:50 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable Thomas Gleixner <tglx@linutronix.de> - 2016-02-27 08:50 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-02-27 15:50 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable Thomas Gleixner <tglx@linutronix.de> - 2016-02-28 16:00 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable Thomas Gleixner <tglx@linutronix.de> - 2016-02-29 17:00 +0100
Re: [patch 10/20] cpu/hotplug: Make target state writeable "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-03-01 03:00 +0100
[tip:smp/hotplug] cpu/hotplug: Make target state writeable tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-03-01 21:00 +0100
Re: [tip:smp/hotplug] cpu/hotplug: Make target state writeable Peter Zijlstra <peterz@infradead.org> - 2016-03-02 13:50 +0100
Re: [tip:smp/hotplug] cpu/hotplug: Make target state writeable Thomas Gleixner <tglx@linutronix.de> - 2016-03-02 21:00 +0100
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