[PATCH 6/8] drm: use priv->pid to deduce task EUID

[David Herrmann]

Rather than accessing priv->filp->f_cred, use priv->pid->task->creds. We
want to get rid of "priv->filp", so lets avoid it if possible.

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 at gmail.com>
---
 drivers/gpu/drm/drm_info.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index 247ba2b..1df2d33 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -99,7 +99,7 @@ int drm_clients_info(struct seq_file *m, void *data)
 
 		rcu_read_lock(); /* locks pid_task()->comm */
 		task = pid_task(priv->pid, PIDTYPE_PID);
-		uid = priv->filp ? priv->filp->f_cred->euid : GLOBAL_ROOT_UID;
+		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
 		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u\n",
 			   task ? task->comm : "<unknown>",
 			   pid_vnr(priv->pid),
-- 
2.9.2