[PATCH] namespaces: utsname: implement CLONE_NEWUTS flag

[linux-drm-fsl-dcu.git] / include / linux / utsname.h

diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 99e522369f4fa2680587566e5105584ee34886c7..02e4b69720645e5a15a04b8f74d0a78b69638b00 100644 (file)
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -47,6 +47,8 @@ static inline void get_uts_ns(struct uts_namespace *ns)
 }
 
 #ifdef CONFIG_UTS_NS
+extern int unshare_utsname(unsigned long unshare_flags,
+                               struct uts_namespace **new_uts);
 extern int copy_utsname(int flags, struct task_struct *tsk);
 extern void free_uts_ns(struct kref *kref);
 
@@ -55,6 +57,15 @@ static inline void put_uts_ns(struct uts_namespace *ns)
        kref_put(&ns->kref, free_uts_ns);
 }
 #else
+static inline int unshare_utsname(unsigned long unshare_flags,
+                       struct uts_namespace **new_uts)
+{
+       if (unshare_flags & CLONE_NEWUTS)
+               return -EINVAL;
+
+       return 0;
+}
+
 static inline int copy_utsname(int flags, struct task_struct *tsk)
 {
        return 0;