drm: remove redundant drm_file->uid

Each DRM file-context caches the EUID of the process that opened the file.
It is used exclusively for debugging purposes in /proc/dri/ and friends.

Note, however, that we can already fetch the EUID from
priv->pid->task->creds. The pointer-chasing will not hurt us, since it is
only about debugging, anyway.

Since we already are in an rcu-read-side, we can use __task_cred() rather
than task_cred_xxx().

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160901124837.680-2-dh.herrmann@gmail.com

1 files changed, 0 insertions, 1 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 94eb138753a9..14f191f0172c 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -379,7 +379,6 @@ struct drm_file {
         unsigned is_master:1;
 
         struct pid *pid;
-        kuid_t uid;
         drm_magic_t magic;
         struct list_head lhead;
         struct drm_minor *minor;