[LTP] [PATCH v2 1/2] syscalls/mlock03：Remove meaningless case

[Yang Xu]

This case is used to read start address and end address
from /proc/self/maps. Then check stack range whether be shorten.

AFAIK, kernel doesn't have this similar bug and man-pages
also doesn't mention it.

So let's remove this meaningful case.

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 runtest/syscalls                           |   1 -
 testcases/kernel/syscalls/mlock/.gitignore |   1 -
 testcases/kernel/syscalls/mlock/mlock03.c  | 119 ---------------------
 3 files changed, 121 deletions(-)
 delete mode 100644 testcases/kernel/syscalls/mlock/mlock03.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 9c23a4248..b58a58c74 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -765,7 +765,6 @@ mknodat02 mknodat02
 
 mlock01 mlock01
 mlock02 mlock02
-mlock03 mlock03 -i 20
 mlock04 mlock04
 
 mlock201 mlock201
diff --git a/testcases/kernel/syscalls/mlock/.gitignore b/testcases/kernel/syscalls/mlock/.gitignore
index 306574bbc..566f0cfcc 100644
--- a/testcases/kernel/syscalls/mlock/.gitignore
+++ b/testcases/kernel/syscalls/mlock/.gitignore
@@ -1,4 +1,3 @@
 /mlock01
 /mlock02
-/mlock03
 /mlock04
diff --git a/testcases/kernel/syscalls/mlock/mlock03.c b/testcases/kernel/syscalls/mlock/mlock03.c
deleted file mode 100644
index 8bc65701c..000000000
--- a/testcases/kernel/syscalls/mlock/mlock03.c
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * Stack size mapping is decreased through mlock/munlock call.
- *
- * This is to test kernel if it has a problem with shortening [stack]
- * mapping through several loops of mlock/munlock of /proc/self/maps.
- *
- * From:
- * munlock     76KiB bfef2000-bff05000 rw-p 00000000 00:00 0          [stack]
- *
- * To:
- * munlock     44KiB bfefa000-bff05000 rw-p 00000000 00:00 0          [stack]
- *
- * with more iterations - could drop to 0KiB.
- *
- * Copyright (C) 2010  Red Hat, Inc.
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it
- * is free of the rightful claim of any third person regarding
- * infringement or the like.  Any license provided herein, whether
- * implied or otherwise, applies only to this software file.  Patent
- * licenses, if any, provided herein do not apply to combinations of
- * this program with other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-#include <sys/mman.h>
-#include <stdio.h>
-#include <string.h>
-#include "test.h"
-
-#define KB 1024
-
-char *TCID = "mlock03";
-int TST_TOTAL = 1;
-
-static void setup(void);
-static void cleanup(void);
-
-int main(int argc, char *argv[])
-{
-	int lc;
-	long from, to;
-	long first = -1, last = -1;
-	char b[KB];
-	FILE *fp;
-
-	tst_parse_opts(argc, argv, NULL, NULL);
-
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		fp = fopen("/proc/self/maps", "r");
-		if (fp == NULL)
-			tst_brkm(TBROK | TERRNO, cleanup, "fopen");
-		while (!feof(fp)) {
-			if (!fgets(b, KB - 1, fp))
-				break;
-			b[strlen(b) - 1] = '\0';
-			sscanf(b, "%lx-%lx", &from, &to);
-
-			/* Record the initial stack size. */
-			if (lc == 0 && strstr(b, "[stack]") != NULL)
-				first = (to - from) / KB;
-
-			switch (lc & 1) {
-			case 0:
-				if (mlock((const void *)from, to - from) == -1)
-					tst_resm(TINFO | TERRNO,
-						 "mlock failed");
-				break;
-			case 1:
-				if (munlock((void *)from, to - from) == -1)
-					tst_resm(TINFO | TERRNO,
-						 "munlock failed");
-				break;
-			default:
-				break;
-			}
-			tst_resm(TINFO, "%s from %lx to %0lx",
-				 (lc & 1) ? "munlock" : "mlock", from, to);
-
-			/* Record the final stack size. */
-			if (strstr(b, "[stack]") != NULL)
-				last = (to - from) / KB;
-		}
-		fclose(fp);
-	}
-	tst_resm(TINFO, "starting stack size is %ld", first);
-	tst_resm(TINFO, "final stack size is %ld", last);
-	if (last < first)
-		tst_resm(TFAIL, "stack size is decreased.");
-	else
-		tst_resm(TPASS, "stack size is not decreased.");
-
-	cleanup();
-	tst_exit();
-}
-
-void setup(void)
-{
-	tst_require_root();
-
-	tst_sig(FORK, DEF_HANDLER, cleanup);
-	TEST_PAUSE;
-}
-
-void cleanup(void)
-{
-}
-- 
2.39.1