s390/topology: cleanup topology code

Mainly merge all different per-cpu arrays into a single array which
holds all topology information per logical cpu.
Also fix the broken core vs socket variable naming and simplify the
locking a bit.
When running in environments without topology information also
invent book, socket and core ids, so that not all ids are zero.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 18 insertions, 16 deletions

diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index 9935cbd6a46f..05425b18c0aa 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -8,32 +8,34 @@ struct cpu;
 
 #ifdef CONFIG_SCHED_BOOK
 
-extern unsigned char cpu_socket_id[NR_CPUS];
-#define topology_physical_package_id(cpu) (cpu_socket_id[cpu])
+struct cpu_topology_s390 {
+        unsigned short core_id;
+        unsigned short socket_id;
+        unsigned short book_id;
+        cpumask_t core_mask;
+        cpumask_t book_mask;
+};
+
+extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
+
+#define topology_physical_package_id(cpu)       (cpu_topology[cpu].socket_id)
+#define topology_core_id(cpu)                   (cpu_topology[cpu].core_id)
+#define topology_core_cpumask(cpu)              (&cpu_topology[cpu].core_mask)
+#define topology_book_id(cpu)                   (cpu_topology[cpu].book_id)
+#define topology_book_cpumask(cpu)              (&cpu_topology[cpu].book_mask)
 
-extern unsigned char cpu_core_id[NR_CPUS];
-extern cpumask_t cpu_core_map[NR_CPUS];
+#define mc_capable() 1
 
 static inline const struct cpumask *cpu_coregroup_mask(int cpu)
 {
-        return &cpu_core_map[cpu];
+        return &cpu_topology[cpu].core_mask;
 }
 
-#define topology_core_id(cpu)           (cpu_core_id[cpu])
-#define topology_core_cpumask(cpu)      (&cpu_core_map[cpu])
-#define mc_capable()                    (1)
-
-extern unsigned char cpu_book_id[NR_CPUS];
-extern cpumask_t cpu_book_map[NR_CPUS];
-
 static inline const struct cpumask *cpu_book_mask(int cpu)
 {
-        return &cpu_book_map[cpu];
+        return &cpu_topology[cpu].book_mask;
 }
 
-#define topology_book_id(cpu)           (cpu_book_id[cpu])
-#define topology_book_cpumask(cpu)      (&cpu_book_map[cpu])
-
 int topology_cpu_init(struct cpu *);
 int topology_set_cpu_management(int fc);
 void topology_schedule_update(void);