ia64/topology: Remove cpus_allowed manipulation

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: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-ia64@vger.kernel.org
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/20170412201042.174518069@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 1a68f012a6dcbe5879b48a015ede236e1d0584f4..d76529cbff2003d4746d2a2b7bbf9b4b2d08044c 100644 (file)
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -355,18 +355,12 @@ static int cache_add_dev(unsigned int cpu)
        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;