cpumask: cpu_coregroup_mask(): x86

Impact: New API

Like cpu_coregroup_map, but returns a (const) pointer.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 45da5dc..168203c 100644 (file)
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -231,6 +231,7 @@ static inline int node_to_first_cpu(int node)
 #endif
 
 extern cpumask_t cpu_coregroup_map(int cpu);
+extern const struct cpumask *cpu_coregroup_mask(int cpu);
 
 #ifdef ENABLE_TOPO_DEFINES
 #define topology_physical_package_id(cpu)      (cpu_data(cpu).phys_proc_id)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 468c2f9..d5274b6 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -497,7 +497,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
 }
 
 /* maps the cpu to the sched domain representing multi-core */
-cpumask_t cpu_coregroup_map(int cpu)
+const struct cpumask *cpu_coregroup_mask(int cpu)
 {
        struct cpuinfo_x86 *c = &cpu_data(cpu);
        /*
@@ -505,9 +505,14 @@ cpumask_t cpu_coregroup_map(int cpu)
         * And for power savings, we return cpu_core_map
         */
        if (sched_mc_power_savings || sched_smt_power_savings)
-               return per_cpu(cpu_core_map, cpu);
+               return &per_cpu(cpu_core_map, cpu);
        else
-               return c->llc_shared_map;
+               return &c->llc_shared_map;
+}
+
+cpumask_t cpu_coregroup_map(int cpu)
+{
+       return *cpu_coregroup_mask(cpu);
 }
 
 static void impress_friends(void)