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-rw-r--r--lib/Makefile2
-rw-r--r--lib/cpumask.c11
2 files changed, 13 insertions, 0 deletions
diff --git a/lib/Makefile b/lib/Makefile
index 648b2c1..f827e3c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -7,6 +7,8 @@ lib-y := errno.o ctype.o string.o vsprintf.o cmdline.o \
idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \
sha1.o
+lib-$(CONFIG_SMP) += cpumask.o
+
lib-y += kobject.o kref.o kobject_uevent.o klist.o
obj-y += sort.o parser.o halfmd4.o iomap_copy.o
diff --git a/lib/cpumask.c b/lib/cpumask.c
new file mode 100644
index 0000000..1560d97
--- /dev/null
+++ b/lib/cpumask.c
@@ -0,0 +1,11 @@
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/cpumask.h>
+#include <linux/module.h>
+
+int __first_cpu(const cpumask_t *srcp)
+{
+ return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS));
+}
+EXPORT_SYMBOL(__first_cpu);
+
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