--- ltp.orig/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-08 11:32:12.000000000 +0200
+++ ltp/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-08 11:45:40.000000000 +0200
@@ -94,6 +94,8 @@ 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