namespaces: move the UTS namespace under UTS_NS option

[safe/jmp/linux-2.6] / include / linux / utsname.h

diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 923db99..1123267 100644 (file)
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -35,6 +35,7 @@ struct new_utsname {
 #include <linux/sched.h>
 #include <linux/kref.h>
 #include <linux/nsproxy.h>
+#include <linux/err.h>
 #include <asm/atomic.h>
 
 struct uts_namespace {
@@ -43,6 +44,7 @@ struct uts_namespace {
 };
 extern struct uts_namespace init_uts_ns;
 
+#ifdef CONFIG_UTS_NS
 static inline void get_uts_ns(struct uts_namespace *ns)
 {
        kref_get(&ns->kref);
@@ -56,6 +58,25 @@ static inline void put_uts_ns(struct uts_namespace *ns)
 {
        kref_put(&ns->kref, free_uts_ns);
 }
+#else
+static inline void get_uts_ns(struct uts_namespace *ns)
+{
+}
+
+static inline void put_uts_ns(struct uts_namespace *ns)
+{
+}
+
+static inline struct uts_namespace *copy_utsname(unsigned long flags,
+                                       struct uts_namespace *ns)
+{
+       if (flags & CLONE_NEWUTS)
+               return ERR_PTR(-EINVAL);
+
+       return ns;
+}
+#endif
+
 static inline struct new_utsname *utsname(void)
 {
        return &current->nsproxy->uts_ns->name;