Commit 8db2bc45 authored by Paul Mundt's avatar Paul Mundt

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: default avatarPaul Mundt <lethal@linux-sh.org>
parent 1cfa1e8f
......@@ -85,6 +85,10 @@ struct sh_cpuinfo {
struct tlb_info itlb;
struct tlb_info dtlb;
#ifdef CONFIG_SMP
struct task_struct *idle;
#endif
unsigned long flags;
} __attribute__ ((aligned(L1_CACHE_BYTES)));
......
......@@ -125,10 +125,15 @@ int __cpuinit __cpu_up(unsigned int cpu)
struct task_struct *tsk;
unsigned long timeout;
tsk = fork_idle(cpu);
if (IS_ERR(tsk)) {
printk(KERN_ERR "Failed forking idle task for cpu %d\n", cpu);
return PTR_ERR(tsk);
tsk = cpu_data[cpu].idle;
if (!tsk) {
tsk = fork_idle(cpu);
if (IS_ERR(tsk)) {
pr_err("Failed forking idle task for cpu %d\n", cpu);
return PTR_ERR(tsk);
}
cpu_data[cpu].idle = tsk;
}
per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
......
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