KSM test case fixes - oom01 and oom03

Before testing 'oom' with KSM pages - checking whether ksm related directory exists in sysfs or not.

oom01:
Before the patch:
...

oom01       0  TINFO  :  start OOM testing for KSM pages.
oom01       0  TINFO  :  allocating 3221225472 bytes.
oom01       1  TBROK  :  madvise: errno=EINVAL(22): Invalid argument
oom01       2  TBROK  :  Remaining cases broken

...

After the patch:
...

oom01       1  TCONF  :  KSM configuration is not enabled
oom01       2  TCONF  :  Remaining cases not appropriate for configuration

...

oom03
Before the patch:
...

oom03       0  TINFO  :  start OOM testing for KSM pages.
oom03       0  TINFO  :  expected victim is 46162.
oom03       1  TFAIL  :  the victim unexpectedly failed: 512
oom03       2  TBROK  :  open 46159: errno=ENOENT(2): No such file or directory
oom03       3  TBROK  :  Remaining cases broken

...

After the patch:
...

oom03       1  TCONF  :  KSM configuration is not enabled
oom03       2  TCONF  :  Remaining cases not appropriate for configuration

...

Regards
R.Nageswara Sastry

@@ -139,6 +139,11 @@ void testoom(int mempolicy, int lite, in
 	tst_resm(TINFO, "start OOM testing for mlocked pages.");
 	oom(MLOCK, mempolicy, lite);
 
+        char *fname = "/sys/kernel/mm/ksm/";
+        if( access( fname, F_OK ) == -1 ) {
+                tst_brkm(TCONF, NULL, "KSM configuration is not enabled");
+        }
+
 	tst_resm(TINFO, "start OOM testing for KSM pages.");
 	oom(KSM, mempolicy, lite);
 }

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