sh: cache secondary CPUs idle loop.
This provides a cache of the secondary CPUs idle loop for the cases where hotplug simply enters a low power state instead of resetting or powering off the core. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -85,6 +85,10 @@ struct sh_cpuinfo {
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struct tlb_info itlb;
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struct tlb_info dtlb;
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#ifdef CONFIG_SMP
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struct task_struct *idle;
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#endif
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unsigned long flags;
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} __attribute__ ((aligned(L1_CACHE_BYTES)));
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@ -125,10 +125,15 @@ int __cpuinit __cpu_up(unsigned int cpu)
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struct task_struct *tsk;
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unsigned long timeout;
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tsk = fork_idle(cpu);
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if (IS_ERR(tsk)) {
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printk(KERN_ERR "Failed forking idle task for cpu %d\n", cpu);
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return PTR_ERR(tsk);
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tsk = cpu_data[cpu].idle;
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if (!tsk) {
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tsk = fork_idle(cpu);
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if (IS_ERR(tsk)) {
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pr_err("Failed forking idle task for cpu %d\n", cpu);
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return PTR_ERR(tsk);
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}
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cpu_data[cpu].idle = tsk;
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}
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per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
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