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authorIngo Molnar <mingo@elte.hu>2008-07-16 00:29:07 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-16 00:29:07 +0200
commit82638844d9a8581bbf33201cc209a14876eca167 (patch)
tree961d7f9360194421a71aa644a9d0c176a960ce49 /kernel/cpu.c
parent9982fbface82893e77d211fbabfbd229da6bdde6 (diff)
parent63cf13b77ab785e87c867defa8545e6d4a989774 (diff)
downloadlinux-82638844d9a8581bbf33201cc209a14876eca167.tar.bz2
Merge branch 'linus' into cpus4096
Conflicts: arch/x86/xen/smp.c kernel/sched_rt.c net/iucv/iucv.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 50ae922c6022..b21ba7e9036d 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -15,6 +15,28 @@
#include <linux/stop_machine.h>
#include <linux/mutex.h>
+/*
+ * Represents all cpu's present in the system
+ * In systems capable of hotplug, this map could dynamically grow
+ * as new cpu's are detected in the system via any platform specific
+ * method, such as ACPI for e.g.
+ */
+cpumask_t cpu_present_map __read_mostly;
+EXPORT_SYMBOL(cpu_present_map);
+
+#ifndef CONFIG_SMP
+
+/*
+ * Represents all cpu's that are currently online.
+ */
+cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
+EXPORT_SYMBOL(cpu_online_map);
+
+cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
+EXPORT_SYMBOL(cpu_possible_map);
+
+#else /* CONFIG_SMP */
+
/* Serializes the updates to cpu_online_map, cpu_present_map */
static DEFINE_MUTEX(cpu_add_remove_lock);
@@ -403,3 +425,5 @@ out:
cpu_maps_update_done();
}
#endif /* CONFIG_PM_SLEEP_SMP */
+
+#endif /* CONFIG_SMP */