From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Thu, 6 Sep 2012 13:19:08 +0000 (+0200)
Subject: s390/kexec: change return value of machine_kexec_prepare
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d978386e79412e45d1aea81eee345dac23d20865;p=linux-beck.git

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 0d5063e0ff79..cc913869e015 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();