lsmod01.sh: Whitelist zcrypt

zcrypt (s390x specific module) has different refcnt:

    lsmod01 1 TINFO: lsmod output different from /proc/modules
    118c118
    < zcrypt 131072 9
    ---
    > zcrypt 131072 8

This is probably due libcrypto update to support hardware acceleration
of some algorithm that kmod is using, which causes increasing refcnt.

Because it's would not be easy to get a generic mechanism to detect
affected modules (ATM probably only zcrypt), whitelist parsing it.

Fixes: https://bugzilla.suse.com/show_bug.cgi?id=1237399
Link: https://lore.kernel.org/ltp/20250221121344.2778278-1-pvorel@suse.cz/
Suggested-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Petr Vorel <pvorel@suse.cz>

Author: pevik

testcases/commands/lsmod/lsmod01.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (c) Linux Test Project, 2016-2021
+# Copyright (c) Linux Test Project, 2016-2025
 # Copyright (c) 2015 Fujitsu Ltd.
 # Author: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
 #
@@ -14,6 +14,10 @@ TST_NEEDS_CMDS="lsmod"
 
 module_inserted=
 
+# lsmod triggers zcrypt refcount increase if it links against libssl
+# which uses hardware acceleration
+whitelist_modules='zcrypt'
+
 setup()
 {
 	if [ -z "$(cat /proc/modules)"  ]; then
@@ -55,8 +59,8 @@ lsmod_matches_proc_modules()
 	if [ "$lsmod_output" != "$modules_output" ]; then
 		tst_res TINFO "lsmod output different from /proc/modules"
 
-		echo "$lsmod_output" > temp1
-		echo "$modules_output" > temp2
+		echo "$lsmod_output" | grep -v "^$whitelist_modules" > temp1
+		echo "$modules_output" | grep -v "^$whitelist_modules" > temp2
 		if tst_cmd_available diff; then
 			diff temp1 temp2
 		else