diff --git a/src/cf/linux-test4.m4 b/src/cf/linux-test4.m4
index a21a2365fb..07e276426a 100644
--- a/src/cf/linux-test4.m4
+++ b/src/cf/linux-test4.m4
@@ -1,3 +1,19 @@
+AC_DEFUN(LINUX_EXPORTS_TASKLIST_LOCK, [
+AC_MSG_CHECKING(for exported tasklist_lock)
+save_CPPFLAGS="$CPPFLAGS"
+CPPFLAGS="-I${LINUX_KERNEL_PATH}/include -D__KERNEL__ $CPPFLAGS"
+AC_CACHE_VAL(ac_cv_linux_exports_tasklist_lock,
+[
+AC_TRY_COMPILE(
+[#include <linux/modversions.h>],
+[#ifndef __ver_tasklist_lock
+#error tasklist_lock not exported
+#endif],
+ac_cv_linux_exports_tasklist_lock=yes,
+ac_cv_linux_exports_tasklist_lock=no)])
+AC_MSG_RESULT($ac_cv_linux_exports_tasklist_lock)
+CPPFLAGS="$save_CPPFLAGS"])
+
 AC_DEFUN(LINUX_FS_STRUCT_INODE_HAS_I_MMAP_SHARED, [
 AC_MSG_CHECKING(for i_mmap_shared in struct inode)
 save_CPPFLAGS="$CPPFLAGS"