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authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-02-04 14:48:25 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-02-12 09:37:22 +0100
commitda0c636ea79380c2001f319844e9a237cf211f96 (patch)
treed80530069364e6d89d4384234414b6a558d33249 /arch/s390/include
parents390/topology: delay initialization of topology cpu masks (diff)
downloadlinux-da0c636ea79380c2001f319844e9a237cf211f96.tar.xz
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s390/topology: convert cpu_topology array to per cpu variable
Convert the per cpu topology cpu masks to a per cpu variable. At least for machines which do have less possible cpus than NR_CPUS this can save a bit of memory (z/VM: max 64 vs 512 for performance_defconfig). This reduces the kernel image size by 100k. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/topology.h18
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index 9454231c9f23..b1453a2ae1ca 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -18,15 +18,15 @@ struct cpu_topology_s390 {
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_thread_id(cpu) (cpu_topology[cpu].thread_id)
-#define topology_thread_cpumask(cpu) (&cpu_topology[cpu].thread_mask)
-#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)
+DECLARE_PER_CPU(struct cpu_topology_s390, cpu_topology);
+
+#define topology_physical_package_id(cpu) (per_cpu(cpu_topology, cpu).socket_id)
+#define topology_thread_id(cpu) (per_cpu(cpu_topology, cpu).thread_id)
+#define topology_thread_cpumask(cpu) (&per_cpu(cpu_topology, cpu).thread_mask)
+#define topology_core_id(cpu) (per_cpu(cpu_topology, cpu).core_id)
+#define topology_core_cpumask(cpu) (&per_cpu(cpu_topology, cpu).core_mask)
+#define topology_book_id(cpu) (per_cpu(cpu_topology, cpu).book_id)
+#define topology_book_cpumask(cpu) (&per_cpu(cpu_topology, cpu).book_mask)
#define mc_capable() 1