Kill unsharing fs_struct in __set_personality()

That's a rudiment of altroot support.  I.e. it should've been buried
a long time ago.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 0 insertions, 22 deletions

diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c
index 667c841c2952..cb8e9626c215 100644
--- a/kernel/exec_domain.c
+++ b/kernel/exec_domain.c
@@ -145,28 +145,6 @@ __set_personality(u_long personality)
                 return 0;
         }
 
-        if (atomic_read(&current->fs->count) != 1) {
-                struct fs_struct *fsp, *ofsp;
-
-                fsp = copy_fs_struct(current->fs);
-                if (fsp == NULL) {
-                        module_put(ep->module);
-                        return -ENOMEM;
-                }
-
-                task_lock(current);
-                ofsp = current->fs;
-                current->fs = fsp;
-                task_unlock(current);
-
-                put_fs_struct(ofsp);
-        }
-
-        /*
-         * At that point we are guaranteed to be the sole owner of
-         * current->fs.
-         */
-
         current->personality = personality;
         oep = current_thread_info()->exec_domain;
         current_thread_info()->exec_domain = ep;