From: Hans-Joachim Picht <hpicht@redhat.com>
Date: Tue, 20 Nov 2007 17:00:00 +0100
Subject: [s390] use IPL CLEAR for reipl under z/VM
Message-id: 20071120160000.GA16152@redhat.com
O-Subject: [RHEL5 U2 PATCH ] s390 - Use IPL CLEAR for reipl under z/VM
Bugzilla: 386991

Description
============

During reipl under z/VM Linux does not clear the memory.
The result is that the pages are not freed in z/VM's memory
management system.

Bugzilla
=========

BZ 386991
https://bugzilla.redhat.com/show_bug.cgi?id=386991

Upstream status of the patch:
=============================
Patch included in git as commit 6517156cd0225d666f53ecaf49b5b4784b0df8b6

Test status:
============
Kernel with patch was built and successfully tested

Please ACK.

With best regards,

Hans

Acked-by: Pete Zaitcev <zaitcev@redhat.com>

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 33a2836..a9bf9e6 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -652,10 +652,10 @@ void do_reipl(void)
 	case IPL_METHOD_CCW_VM:
 		reipl_get_ascii_loadparm(loadparm);
 		if (strlen(loadparm) == 0)
-			sprintf(buf, "IPL %X",
+			sprintf(buf, "IPL %X CLEAR",
 				reipl_block_ccw->ipl_info.ccw.devno);
 		else
-			sprintf(buf, "IPL %X LOADPARM '%s'",
+			sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
 				reipl_block_ccw->ipl_info.ccw.devno, loadparm);
 		cpcmd(buf, NULL, 0, NULL);
 		break;