summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/smp.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c36
1 files changed, 2 insertions, 34 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index db8f1115a3bf..efd2c1968000 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -198,19 +198,11 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
lc->panic_stack = panic_stack + PANIC_FRAME_OFFSET;
lc->cpu_nr = cpu;
lc->spinlock_lockval = arch_spin_lockval(cpu);
-#ifndef CONFIG_64BIT
- if (MACHINE_HAS_IEEE) {
- lc->extended_save_area_addr = get_zeroed_page(GFP_KERNEL);
- if (!lc->extended_save_area_addr)
- goto out;
- }
-#else
if (MACHINE_HAS_VX)
lc->vector_save_area_addr =
(unsigned long) &lc->vector_save_area;
if (vdso_alloc_per_cpu(lc))
goto out;
-#endif
lowcore_ptr[cpu] = lc;
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);
return 0;
@@ -229,16 +221,7 @@ static void pcpu_free_lowcore(struct pcpu *pcpu)
{
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, 0);
lowcore_ptr[pcpu - pcpu_devices] = NULL;
-#ifndef CONFIG_64BIT
- if (MACHINE_HAS_IEEE) {
- struct _lowcore *lc = pcpu->lowcore;
-
- free_page((unsigned long) lc->extended_save_area_addr);
- lc->extended_save_area_addr = 0;
- }
-#else
vdso_free_per_cpu(pcpu->lowcore);
-#endif
if (pcpu == &pcpu_devices[0])
return;
free_page(pcpu->lowcore->panic_stack-PANIC_FRAME_OFFSET);
@@ -492,22 +475,6 @@ void arch_send_call_function_single_ipi(int cpu)
pcpu_ec_call(pcpu_devices + cpu, ec_call_function_single);
}
-#ifndef CONFIG_64BIT
-/*
- * this function sends a 'purge tlb' signal to another CPU.
- */
-static void smp_ptlb_callback(void *info)
-{
- __tlb_flush_local();
-}
-
-void smp_ptlb_all(void)
-{
- on_each_cpu(smp_ptlb_callback, NULL, 1);
-}
-EXPORT_SYMBOL(smp_ptlb_all);
-#endif /* ! CONFIG_64BIT */
-
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing
@@ -851,7 +818,8 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
pcpu_prepare_secondary(pcpu, cpu);
pcpu_attach_task(pcpu, tidle);
pcpu_start_fn(pcpu, smp_start_secondary, NULL);
- while (!cpu_online(cpu))
+ /* Wait until cpu puts itself in the online & active maps */
+ while (!cpu_online(cpu) || !cpu_active(cpu))
cpu_relax();
return 0;
}