From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>, Sebastian Siewior <bigeasy@linutronix.de>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, "David S. Miller" <davem@davemloft.net>, Fenghua Yu <fenghua.yu@intel.com>, Herbert Xu <herbert@gondor.apana.org.au>, Lai Jiangshan <jiangshanlai@gmail.com>, Len Brown <lenb@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Tejun Heo <tj@kernel.org>, Tony Luck <tony.luck@intel.com>, Viresh Kumar <viresh.kumar@linaro.org>, linux-ia64@vger.kernel.org Subject: [patch 01/13] ia64/topology: Remove cpus_allowed manipulation Date: Wed, 12 Apr 2017 22:07:27 +0200 [thread overview] Message-ID: <20170412201042.174518069@linutronix.de> (raw) In-Reply-To: 20170412200726.941336635@linutronix.de [-- Attachment #1: ia64-topology--Remove-cpus_allowed-hackery.patch --] [-- Type: text/plain, Size: 964 bytes --] The CPU hotplug callback fiddles with the cpus_allowed pointer to pin the calling thread on the plugged CPU. That's already guaranteed by the hotplug core code. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org --- arch/ia64/kernel/topology.c | 6 ------ 1 file changed, 6 deletions(-) --- a/arch/ia64/kernel/topology.c +++ b/arch/ia64/kernel/topology.c @@ -355,18 +355,12 @@ static int cache_add_dev(unsigned int cp unsigned long i, j; struct cache_info *this_object; int retval = 0; - cpumask_t oldmask; if (all_cpu_cache_info[cpu].kobj.parent) return 0; - oldmask = current->cpus_allowed; - retval = set_cpus_allowed_ptr(current, cpumask_of(cpu)); - if (unlikely(retval)) - return retval; retval = cpu_cache_sysfs_init(cpu); - set_cpus_allowed_ptr(current, &oldmask); if (unlikely(retval < 0)) return retval;
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>, Sebastian Siewior <bigeasy@linutronix.de>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, "David S. Miller" <davem@davemloft.net>, Fenghua Yu <fenghua.yu@intel.com>, Herbert Xu <herbert@gondor.apana.org.au>, Lai Jiangshan <jiangshanlai@gmail.com>, Len Brown <lenb@kernel.org>, Michael Ellerman <mpe@ellerman.id.au>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Tejun Heo <tj@kernel.org>, Tony Luck <tony.luck@intel.com>, Viresh Kumar <viresh.kumar@linaro.org>, linux-ia64@vger.kernel.org Subject: [patch 01/13] ia64/topology: Remove cpus_allowed manipulation Date: Wed, 12 Apr 2017 20:07:27 +0000 [thread overview] Message-ID: <20170412201042.174518069@linutronix.de> (raw) In-Reply-To: 20170412200726.941336635@linutronix.de The CPU hotplug callback fiddles with the cpus_allowed pointer to pin the calling thread on the plugged CPU. That's already guaranteed by the hotplug core code. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org --- arch/ia64/kernel/topology.c | 6 ------ 1 file changed, 6 deletions(-) --- a/arch/ia64/kernel/topology.c +++ b/arch/ia64/kernel/topology.c @@ -355,18 +355,12 @@ static int cache_add_dev(unsigned int cp unsigned long i, j; struct cache_info *this_object; int retval = 0; - cpumask_t oldmask; if (all_cpu_cache_info[cpu].kobj.parent) return 0; - oldmask = current->cpus_allowed; - retval = set_cpus_allowed_ptr(current, cpumask_of(cpu)); - if (unlikely(retval)) - return retval; retval = cpu_cache_sysfs_init(cpu); - set_cpus_allowed_ptr(current, &oldmask); if (unlikely(retval < 0)) return retval;
next prev parent reply other threads:[~2017-04-12 20:20 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-12 20:07 [patch 00/13] sched/treewide: Clean up various racy task affinity issues Thomas Gleixner 2017-04-12 20:07 ` Thomas Gleixner [this message] 2017-04-12 20:07 ` [patch 01/13] ia64/topology: Remove cpus_allowed manipulation Thomas Gleixner 2017-04-15 14:15 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 02/13] workqueue: Provide work_on_cpu_safe() Thomas Gleixner 2017-04-13 11:11 ` Dou Liyang 2017-04-13 21:28 ` Thomas Gleixner 2017-04-14 4:18 ` Tejun Heo 2017-04-14 8:54 ` Peter Zijlstra 2017-04-14 9:51 ` Thomas Gleixner 2017-04-14 9:56 ` Peter Zijlstra 2017-04-15 14:16 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 03/13] ia64/salinfo: Replace racy task affinity logic Thomas Gleixner 2017-04-12 20:07 ` Thomas Gleixner 2017-04-15 14:17 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 04/13] ia64/sn/hwperf: " Thomas Gleixner 2017-04-12 20:07 ` Thomas Gleixner 2017-04-12 20:53 ` [patch V 2 " Thomas Gleixner 2017-04-12 20:53 ` Thomas Gleixner 2017-04-15 14:17 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 05/13] powerpc/smp: Replace open coded " Thomas Gleixner 2017-04-12 20:07 ` Thomas Gleixner 2017-04-13 5:47 ` Michael Ellerman 2017-04-15 14:18 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 06/13] sparc/sysfs: Replace racy " Thomas Gleixner 2017-04-12 20:07 ` Thomas Gleixner 2017-04-13 1:52 ` David Miller 2017-04-13 1:52 ` David Miller 2017-04-13 8:17 ` [patch V2 " Thomas Gleixner 2017-04-13 8:17 ` Thomas Gleixner 2017-04-15 14:18 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 07/13] ACPI/processor: Fix error handling in __acpi_processor_start() Thomas Gleixner 2017-04-15 14:19 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 08/13] ACPI/processor: Replace racy task affinity logic Thomas Gleixner 2017-04-13 11:39 ` Peter Zijlstra 2017-04-13 12:01 ` Thomas Gleixner 2017-04-13 12:52 ` Peter Zijlstra 2017-04-15 14:19 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 09/13] cpufreq/ia64: " Thomas Gleixner 2017-04-12 20:55 ` [patch V2 " Thomas Gleixner 2017-04-15 14:20 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-13 2:42 ` [patch 09/13] " Viresh Kumar 2017-04-12 20:07 ` [patch 10/13] cpufreq/sh: " Thomas Gleixner 2017-04-13 2:46 ` Viresh Kumar 2017-04-15 14:20 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 11/13] cpufreq/sparc-us3: " Thomas Gleixner 2017-04-13 2:48 ` Viresh Kumar 2017-04-15 14:21 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-12 20:07 ` [patch 12/13] cpufreq/sparc-us2e: " Thomas Gleixner 2017-04-13 2:50 ` Viresh Kumar 2017-04-13 8:19 ` [patch V2 " Thomas Gleixner 2017-04-13 8:22 ` [patch V3 " Thomas Gleixner 2017-04-15 14:21 ` [tip:sched/core] " tip-bot for Thomas Gleixner 2017-04-13 14:50 ` [patch V2 12/13] " David Miller 2017-04-12 20:07 ` [patch 13/13] crypto: n2 - " Thomas Gleixner 2017-04-13 4:56 ` Herbert Xu 2017-04-13 8:20 ` [patch V2 " Thomas Gleixner 2017-04-13 14:51 ` David Miller 2017-04-15 14:22 ` [tip:sched/core] crypto: N2 " tip-bot for Thomas Gleixner 2017-04-13 9:02 ` [patch 00/13] sched/treewide: Clean up various racy task affinity issues Peter Zijlstra
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