1 files changed, 4 insertions, 37 deletions

diff --git a/kernel/utsname.c b/kernel/utsname.c
index c859164a6993..160c8c5136bd 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -32,58 +32,25 @@ static struct uts_namespace *clone_uts_ns(struct uts_namespace *old_ns)
 }
 
 /*
- * unshare the current process' utsname namespace.
- * called only in sys_unshare()
- */
-int unshare_utsname(unsigned long unshare_flags, struct uts_namespace **new_uts)
-{
-        if (unshare_flags & CLONE_NEWUTS) {
-                if (!capable(CAP_SYS_ADMIN))
-                        return -EPERM;
-
-                *new_uts = clone_uts_ns(current->nsproxy->uts_ns);
-                if (!*new_uts)
-                        return -ENOMEM;
-        }
-
-        return 0;
-}
-
-/*
  * Copy task tsk's utsname namespace, or clone it if flags
  * specifies CLONE_NEWUTS.  In latter case, changes to the
  * utsname of this process won't be seen by parent, and vice
  * versa.
  */
-int copy_utsname(int flags, struct task_struct *tsk)
+struct uts_namespace *copy_utsname(int flags, struct uts_namespace *old_ns)
 {
-        struct uts_namespace *old_ns = tsk->nsproxy->uts_ns;
         struct uts_namespace *new_ns;
-        int err = 0;
-
-        if (!old_ns)
-                return 0;
 
+        BUG_ON(!old_ns);
         get_uts_ns(old_ns);
 
         if (!(flags & CLONE_NEWUTS))
-                return 0;
-
-        if (!capable(CAP_SYS_ADMIN)) {
-                err = -EPERM;
-                goto out;
-        }
+                return old_ns;
 
         new_ns = clone_uts_ns(old_ns);
-        if (!new_ns) {
-                err = -ENOMEM;
-                goto out;
-        }
-        tsk->nsproxy->uts_ns = new_ns;
 
-out:
         put_uts_ns(old_ns);
-        return err;
+        return new_ns;
 }
 
 void free_uts_ns(struct kref *kref)