From: catalin.marinas@arm•com (Catalin Marinas)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/4] arm64: topology: Implement basic CPU topology support
Date: Mon, 10 Feb 2014 16:22:31 +0000 [thread overview]
Message-ID: <20140210162230.GK25305@arm.com> (raw)
In-Reply-To: <1392037324-5069-1-git-send-email-broonie@kernel.org>
On Mon, Feb 10, 2014 at 01:02:01PM +0000, Mark Brown wrote:
> +static void update_siblings_masks(unsigned int cpuid)
> +{
> + struct cpu_topology *cpu_topo, *cpuid_topo = &cpu_topology[cpuid];
> + int cpu;
> +
> + /* update core and thread sibling masks */
> + for_each_possible_cpu(cpu) {
> + cpu_topo = &cpu_topology[cpu];
> +
> + if (cpuid_topo->cluster_id != cpu_topo->cluster_id)
> + continue;
> +
> + cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);
> + if (cpu != cpuid)
> + cpumask_set_cpu(cpu, &cpuid_topo->core_sibling);
> +
> + if (cpuid_topo->core_id != cpu_topo->core_id)
> + continue;
> +
> + cpumask_set_cpu(cpuid, &cpu_topo->thread_sibling);
> + if (cpu != cpuid)
> + cpumask_set_cpu(cpu, &cpuid_topo->thread_sibling);
> + }
> + smp_wmb();
I now noticed there are a couple of smp_wmb() calls in this patch. What
are they for?
--
Catalin
next prev parent reply other threads:[~2014-02-10 16:22 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-10 13:02 [PATCH 1/4] arm64: topology: Implement basic CPU topology support Mark Brown
2014-02-10 13:02 ` [PATCH 2/4] arm64: topology: Add support for topology DT bindings Mark Brown
2014-02-10 13:02 ` [PATCH 3/4] arm64: topology: Tell the scheduler about the relative power of cores Mark Brown
2014-02-10 13:02 ` [PATCH 4/4] arm64: topology: Provide relative power numbers for cores Mark Brown
2014-02-10 16:22 ` Catalin Marinas [this message]
2014-02-10 16:46 ` [PATCH 1/4] arm64: topology: Implement basic CPU topology support Mark Brown
2014-02-11 8:15 ` Vincent Guittot
2014-02-11 10:34 ` Will Deacon
2014-02-11 13:18 ` Vincent Guittot
2014-02-11 14:07 ` Catalin Marinas
2014-02-11 14:46 ` Vincent Guittot
2014-02-11 22:04 ` Mark Brown
2014-02-12 8:04 ` Vincent Guittot
2014-02-12 10:27 ` Catalin Marinas
2014-02-12 12:34 ` Mark Brown
2014-02-21 15:01 ` Lorenzo Pieralisi
2014-02-22 2:06 ` Mark Brown
2014-02-22 12:26 ` Lorenzo Pieralisi
2014-02-23 2:09 ` Mark Brown
-- strict thread matches above, loose matches on Subject: below --
2014-02-26 0:48 [PATCH 0/4] arm64: Topology Mark Brown
2014-02-26 0:48 ` [PATCH 1/4] arm64: topology: Implement basic CPU topology support Mark Brown
2014-02-25 4:25 [PATCH 0/4] arm64: topology: " Mark Brown
2014-02-25 4:25 ` [PATCH 1/4] arm64: topology: Implement basic " Mark Brown
2014-02-25 16:54 ` Lorenzo Pieralisi
2014-02-26 0:50 ` Mark Brown
2014-02-26 12:32 ` Lorenzo Pieralisi
2014-02-26 14:46 ` Mark Brown
2014-02-26 15:48 ` Catalin Marinas
2014-02-26 17:50 ` Lorenzo Pieralisi
2014-02-27 4:30 ` Mark Brown
2014-02-27 4:20 ` Mark Brown
2014-02-11 22:06 Mark Brown
2014-01-15 11:38 [PATCH v12 0/4] arm64 topology Mark Brown
2014-01-15 11:38 ` [PATCH 1/4] arm64: topology: Implement basic CPU topology support Mark Brown
2014-01-12 19:20 [PATCH v11 0/4] ARMv8 cpu topology Mark Brown
2014-01-12 19:20 ` [PATCH 1/4] arm64: topology: Implement basic CPU topology support Mark Brown
2014-01-13 16:10 ` Lorenzo Pieralisi
2014-01-13 16:30 ` Mark Brown
2014-01-13 17:44 ` Lorenzo Pieralisi
2014-01-14 8:17 ` Vincent Guittot
2014-01-13 16:44 ` Vincent Guittot
2014-01-13 17:33 ` Lorenzo Pieralisi
2014-01-08 19:12 Mark Brown
2014-01-09 11:48 ` Catalin Marinas
2014-01-08 17:10 Mark Brown
2014-01-08 18:30 ` Lorenzo Pieralisi
2014-01-08 18:40 ` Mark Brown
2014-01-09 12:40 ` Lorenzo Pieralisi
2013-12-19 20:06 [PATCH 0/4] arm64 " Mark Brown
2013-12-19 20:06 ` [PATCH 1/4] arm64: topology: Implement basic CPU " Mark Brown
2013-12-16 16:49 Mark Brown
2013-12-17 17:06 ` Lorenzo Pieralisi
2013-12-17 19:55 ` Mark Brown
2013-12-18 17:39 ` Lorenzo Pieralisi
2013-12-18 18:00 ` Mark Brown
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