kern/cpumap: initialize cpumap_active_cpus

The cpumap_all function may be called before the cpumap module is
initialized. Make the cpumap_active_cpus cpumap initialized in the data
section, representing the BSP only.

2 files changed, 4 insertions, 1 deletions

diff --git a/kern/cpumap.c b/kern/cpumap.c
index 68a84ab..7113af5 100644
--- a/kern/cpumap.c
+++ b/kern/cpumap.c
@@ -23,7 +23,7 @@
 #include <kern/stddef.h>
 #include <machine/cpu.h>
 
-static struct cpumap cpumap_active_cpus __read_mostly;
+static struct cpumap cpumap_active_cpus __read_mostly = { { 1 } };
 
 static struct kmem_cache cpumap_cache;
 
diff --git a/kern/cpumap.h b/kern/cpumap.h
index 0e57c30..68a040c 100644
--- a/kern/cpumap.h
+++ b/kern/cpumap.h
@@ -141,6 +141,9 @@ void cpumap_setup(void);
 
 /*
  * Return a cpumap representing all active processors.
+ *
+ * Until the cpumap module is initialized, the cpumap returned by this
+ * function describes the BSP only.
  */
 const struct cpumap * cpumap_all(void);