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Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c18
1 files changed, 4 insertions, 14 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 7b89a7572100..35531fe1c5ea 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -242,10 +242,8 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu)
{
struct lowcore *lc = pcpu->lowcore;
- if (MACHINE_HAS_TLB_LC)
- cpumask_set_cpu(cpu, &init_mm.context.cpu_attach_mask);
+ cpumask_set_cpu(cpu, &init_mm.context.cpu_attach_mask);
cpumask_set_cpu(cpu, mm_cpumask(&init_mm));
- atomic_inc(&init_mm.context.attach_count);
lc->cpu_nr = cpu;
lc->spinlock_lockval = arch_spin_lockval(cpu);
lc->percpu_offset = __per_cpu_offset[cpu];
@@ -320,17 +318,11 @@ static void pcpu_delegate(struct pcpu *pcpu, void (*func)(void *),
*/
static int pcpu_set_smt(unsigned int mtid)
{
- register unsigned long reg1 asm ("1") = (unsigned long) mtid;
int cc;
if (smp_cpu_mtid == mtid)
return 0;
- asm volatile(
- " sigp %1,0,%2 # sigp set multi-threading\n"
- " ipm %0\n"
- " srl %0,28\n"
- : "=d" (cc) : "d" (reg1), "K" (SIGP_SET_MULTI_THREADING)
- : "cc");
+ cc = __pcpu_sigp(0, SIGP_SET_MULTI_THREADING, mtid, NULL);
if (cc == 0) {
smp_cpu_mtid = mtid;
smp_cpu_mt_shift = 0;
@@ -876,10 +868,8 @@ void __cpu_die(unsigned int cpu)
while (!pcpu_stopped(pcpu))
cpu_relax();
pcpu_free_lowcore(pcpu);
- atomic_dec(&init_mm.context.attach_count);
cpumask_clear_cpu(cpu, mm_cpumask(&init_mm));
- if (MACHINE_HAS_TLB_LC)
- cpumask_clear_cpu(cpu, &init_mm.context.cpu_attach_mask);
+ cpumask_clear_cpu(cpu, &init_mm.context.cpu_attach_mask);
}
void __noreturn cpu_die(void)
@@ -897,7 +887,7 @@ void __init smp_fill_possible_mask(void)
sclp_max = max(sclp.mtid, sclp.mtid_cp) + 1;
sclp_max = min(smp_max_threads, sclp_max);
- sclp_max = sclp.max_cores * sclp_max ?: nr_cpu_ids;
+ sclp_max = (sclp.max_cores * sclp_max) ?: nr_cpu_ids;
possible = setup_possible_cpus ?: nr_cpu_ids;
possible = min(possible, sclp_max);
for (cpu = 0; cpu < possible && cpu < nr_cpu_ids; cpu++)