s390/smp,topology: add polarization member to pcpu struct
The cpu polarization member is the only per cpu state that is not part
of the pcpu structure. So add it there and have everything in one place.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index c88fe85..8676aab 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -66,6 +66,7 @@
unsigned long panic_stack; /* panic stack for the cpu */
unsigned long ec_mask; /* bit mask for ec_xxx functions */
int state; /* physical cpu state */
+ int polarization; /* physical polarization */
u16 address; /* physical cpu address */
};
@@ -73,6 +74,10 @@
static u16 boot_cpu_address;
static struct pcpu pcpu_devices[NR_CPUS];
+/*
+ * The smp_cpu_state_mutex must be held when changing the state or polarization
+ * member of a pcpu data structure within the pcpu_devices arreay.
+ */
DEFINE_MUTEX(smp_cpu_state_mutex);
/*
@@ -587,6 +592,16 @@
#endif /* CONFIG_ZFCPDUMP || CONFIG_CRASH_DUMP */
+void smp_cpu_set_polarization(int cpu, int val)
+{
+ pcpu_devices[cpu].polarization = val;
+}
+
+int smp_cpu_get_polarization(int cpu)
+{
+ return pcpu_devices[cpu].polarization;
+}
+
static struct sclp_cpu_info *smp_get_cpu_info(void)
{
static int use_sigp_detection;
@@ -629,7 +644,7 @@
pcpu->address = info->cpu[i].address;
pcpu->state = (cpu >= info->configured) ?
CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
- cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
set_cpu_present(cpu, true);
if (sysfs_add && smp_add_present_cpu(cpu) != 0)
set_cpu_present(cpu, false);
@@ -797,7 +812,7 @@
pcpu->async_stack = S390_lowcore.async_stack - ASYNC_SIZE;
pcpu->panic_stack = S390_lowcore.panic_stack - PAGE_SIZE;
S390_lowcore.percpu_offset = __per_cpu_offset[0];
- cpu_set_polarization(0, POLARIZATION_UNKNOWN);
+ smp_cpu_set_polarization(0, POLARIZATION_UNKNOWN);
set_cpu_present(0, true);
set_cpu_online(0, true);
}
@@ -863,7 +878,7 @@
if (rc)
break;
pcpu->state = CPU_STATE_STANDBY;
- cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
topology_expect_change();
break;
case 1:
@@ -873,7 +888,7 @@
if (rc)
break;
pcpu->state = CPU_STATE_CONFIGURED;
- cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+ smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
topology_expect_change();
break;
default: