From: Andrew Morton <akpm@osdl.org>

Don't try to evaluate `current' at compile time - ia64 explodes.

Cc: Sam Vilain <sam.vilain@catalyst.net.nz>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andrey Savochkin <saw@sw.ru>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/sysctl.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff -puN kernel/sysctl.c~namespaces-utsname-sysctl-hack-cleanup-2-fix kernel/sysctl.c
--- a/kernel/sysctl.c~namespaces-utsname-sysctl-hack-cleanup-2-fix
+++ a/kernel/sysctl.c
@@ -292,7 +292,7 @@ static ctl_table kern_table[] = {
 		.procname	= "ostype",
 		.data		= NULL,
 		/* could maybe use __NEW_UTS_LEN here? */
-		.maxlen		= sizeof(current->nsproxy->uts_ns->name.sysname),
+		.maxlen		= FIELD_SIZEOF(struct new_utsname, sysname),
 		.mode		= 0444,
 		.proc_handler	= &proc_do_utsns_string,
 		.strategy	= &sysctl_string,
@@ -301,7 +301,7 @@ static ctl_table kern_table[] = {
 		.ctl_name	= KERN_OSRELEASE,
 		.procname	= "osrelease",
 		.data		= NULL,
-		.maxlen		= sizeof(current->nsproxy->uts_ns->name.release),
+		.maxlen		= FIELD_SIZEOF(struct new_utsname, release),
 		.mode		= 0444,
 		.proc_handler	= &proc_do_utsns_string,
 		.strategy	= &sysctl_string,
@@ -310,7 +310,7 @@ static ctl_table kern_table[] = {
 		.ctl_name	= KERN_VERSION,
 		.procname	= "version",
 		.data		= NULL,
-		.maxlen		= sizeof(current->nsproxy->uts_ns->name.version),
+		.maxlen		= FIELD_SIZEOF(struct new_utsname, version),
 		.mode		= 0444,
 		.proc_handler	= &proc_do_utsns_string,
 		.strategy	= &sysctl_string,
@@ -319,7 +319,7 @@ static ctl_table kern_table[] = {
 		.ctl_name	= KERN_NODENAME,
 		.procname	= "hostname",
 		.data		= NULL,
-		.maxlen		= sizeof(current->nsproxy->uts_ns->name.nodename),
+		.maxlen		= FIELD_SIZEOF(struct new_utsname, nodename),
 		.mode		= 0644,
 		.proc_handler	= &proc_do_utsns_string,
 		.strategy	= &sysctl_string,
@@ -328,7 +328,7 @@ static ctl_table kern_table[] = {
 		.ctl_name	= KERN_DOMAINNAME,
 		.procname	= "domainname",
 		.data		= NULL,
-		.maxlen		= sizeof(current->nsproxy->uts_ns->name.domainname),
+		.maxlen		= FIELD_SIZEOF(struct new_utsname, domainname),
 		.mode		= 0644,
 		.proc_handler	= &proc_do_utsns_string,
 		.strategy	= &sysctl_string,
_