s390/topology: fix core id vs physical package id mix-up

The current topology code confuses core id vs physical package id.

In other words /sys/devices/system/cpu/cpuX/topology/core_id
displays the physical_package_id (aka socket id) instead of the
core id.
The physical_package_id sysfs attribute always displays "-1"
instead of the socket id.

Fix this mix-up with a small patch which defines and initializes
topology_physical_package_id correctly and fixes the broken
core id handling.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/topology.h

@@ -8,6 +8,9 @@ struct cpu;
 
 #ifdef CONFIG_SCHED_BOOK
 
+extern unsigned char cpu_socket_id[NR_CPUS];
+#define topology_physical_package_id(cpu) (cpu_socket_id[cpu])
+
 extern unsigned char cpu_core_id[NR_CPUS];
 extern cpumask_t cpu_core_map[NR_CPUS];
 

arch/s390/kernel/topology.c

@@ -40,6 +40,7 @@ static DEFINE_SPINLOCK(topology_lock);
 static struct mask_info core_info;
 cpumask_t cpu_core_map[NR_CPUS];
 unsigned char cpu_core_id[NR_CPUS];
+unsigned char cpu_socket_id[NR_CPUS];
 
 static struct mask_info book_info;
 cpumask_t cpu_book_map[NR_CPUS];
@@ -83,11 +84,12 @@ static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
 			cpumask_set_cpu(lcpu, &book->mask);
 			cpu_book_id[lcpu] = book->id;
 			cpumask_set_cpu(lcpu, &core->mask);
-			if (one_core_per_cpu) {
 			cpu_core_id[lcpu] = rcpu;
+			if (one_core_per_cpu) {
+				cpu_socket_id[lcpu] = rcpu;
 				core = core->next;
 			} else {
-				cpu_core_id[lcpu] = core->id;
+				cpu_socket_id[lcpu] = core->id;
 			}
 			smp_cpu_set_polarization(lcpu, tl_cpu->pp);
 		}