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Message-Id: <20120309190216.036348196@linuxfoundation.org>
Date: Fri, 09 Mar 2012 11:02:27 -0800
From: Greg KH <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
alan@...rguk.ukuu.org.uk, David Howells <dhowells@...hat.com>,
Carsten Otte <cotte@...ibm.com>,
Christian Borntraeger <borntraeger@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: [ 13/68] S390: KEYS: Enable the compat keyctl wrapper on s390x
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: David Howells <dhowells@...hat.com>
commit 1d057720609ed052a6371fe1d53300e5e6328e94 upstream.
Enable the compat keyctl wrapper on s390x so that 32-bit s390 userspace can
call the keyctl() syscall.
There's an s390x assembly wrapper that truncates all the register values to
32-bits and this then calls compat_sys_keyctl() - but the latter only exists if
CONFIG_KEYS_COMPAT is enabled, and the s390 Kconfig doesn't enable it.
Without this patch, 32-bit calls to the keyctl() syscall are given an ENOSYS
error:
[root@...el4 ~]# keyctl show
Session Keyring
-3: key inaccessible (Function not implemented)
Signed-off-by: David Howells <dhowells@...hat.com>
Acked-by: dan@...ny.cz
Cc: Carsten Otte <cotte@...ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@...ibm.com>
Cc: linux-s390@...r.kernel.org
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
arch/s390/Kconfig | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -228,6 +228,9 @@ config COMPAT
config SYSVIPC_COMPAT
def_bool y if COMPAT && SYSVIPC
+config KEYS_COMPAT
+ def_bool y if COMPAT && KEYS
+
config AUDIT_ARCH
def_bool y
--
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