--- ltp.orig/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-05 08:42:12.000000000 +0200
+++ ltp/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-06 14:50:28.000000000 +0200
@@ -62,6 +62,7 @@
 #include "test.h"
 #include "usctest.h"
 #include "config.h"
+#include "../../mem/include/mem.h"
 
 #define SIZE (5*1024*1024)
 
@@ -94,6 +95,8 @@ int main(int argc, char *argv[])
 
 	if (opt_ksm)
 	{
+		if(access( PATH_KSM, F_OK ) == -1)
+			tst_brkm(TCONF, NULL, "KSM configuration is not enabled");
 #ifdef HAVE_MADV_MERGEABLE
 		tst_resm(TINFO, "add to KSM regions.");
 #else