--- ltp.orig/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-05 08:42:12.000000000 +0200
+++ ltp/testcases/kernel/syscalls/mmap/mmap10.c	2011-09-05 08:46:53.000000000 +0200
@@ -94,6 +94,11 @@ int main(int argc, char *argv[])
 
 	if (opt_ksm)
 	{
+                char *fname = "/sys/kernel/mm/ksm/";
+
+                if( access( fname, F_OK ) == -1 ) {
+                        tst_brkm(TCONF, NULL, "KSM configuration is not enabled");
+                }
 #ifdef HAVE_MADV_MERGEABLE
 		tst_resm(TINFO, "add to KSM regions.");
 #else