From d978386e79412e45d1aea81eee345dac23d20865 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Thu, 6 Sep 2012 15:19:08 +0200
Subject: s390/kexec: change return value of machine_kexec_prepare

Returning -ENOSYS on kexec_load() is a bad idea since user space cannot
tell if the system call is not implmented or if it failed.
Use -EOPNOTSUPP in case somebody tries a kexec_load on a NSS image based
kernel instead.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 0d5063e0..cc91386 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -159,7 +159,7 @@ int machine_kexec_prepare(struct kimage *image)
 
 	/* Can't replace kernel image since it is read-only. */
 	if (ipl_flags & IPL_NSS_VALID)
-		return -ENOSYS;
+		return -EOPNOTSUPP;
 
 	if (image->type == KEXEC_TYPE_CRASH)
 		return machine_kexec_prepare_kdump();
-- 
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