55 lines
1.8 KiB
Diff
55 lines
1.8 KiB
Diff
From 048c9b954e20396e0c45ee778466994d1be2e612 Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 12 Apr 2017 22:07:27 +0200
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Subject: [PATCH 01/13] ia64/topology: Remove cpus_allowed manipulation
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.11/older/patches-4.11.5-rt1.tar.xz
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The CPU hotplug callback fiddles with the cpus_allowed pointer to pin the
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calling thread on the plugged CPU. That's already guaranteed by the hotplug
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core code.
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Remove it.
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: Fenghua Yu <fenghua.yu@intel.com>
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Cc: Tony Luck <tony.luck@intel.com>
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Cc: linux-ia64@vger.kernel.org
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Cc: Herbert Xu <herbert@gondor.apana.org.au>
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Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
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Cc: Peter Zijlstra <peterz@infradead.org>
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Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Cc: Sebastian Siewior <bigeasy@linutronix.de>
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Cc: Lai Jiangshan <jiangshanlai@gmail.com>
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Cc: Viresh Kumar <viresh.kumar@linaro.org>
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Cc: Michael Ellerman <mpe@ellerman.id.au>
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Cc: Tejun Heo <tj@kernel.org>
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Cc: "David S. Miller" <davem@davemloft.net>
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Cc: Len Brown <lenb@kernel.org>
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Link: http://lkml.kernel.org/r/20170412201042.174518069@linutronix.de
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/ia64/kernel/topology.c | 6 ------
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1 file changed, 6 deletions(-)
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--- a/arch/ia64/kernel/topology.c
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+++ b/arch/ia64/kernel/topology.c
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@@ -355,18 +355,12 @@ static int cache_add_dev(unsigned int cp
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unsigned long i, j;
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struct cache_info *this_object;
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int retval = 0;
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- cpumask_t oldmask;
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if (all_cpu_cache_info[cpu].kobj.parent)
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return 0;
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- oldmask = current->cpus_allowed;
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- retval = set_cpus_allowed_ptr(current, cpumask_of(cpu));
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- if (unlikely(retval))
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- return retval;
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retval = cpu_cache_sysfs_init(cpu);
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- set_cpus_allowed_ptr(current, &oldmask);
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if (unlikely(retval < 0))
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return retval;
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