diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2016-09-01 14:48:32 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-09-19 11:21:42 +0200 |
| commit | 75ae95a75d640129fc4aff412c6ecc057142a149 (patch) | |
| tree | d817f26904e91149331b747cad08777e48d90e54 /drivers/gpu/drm | |
| parent | 9f8cf165c62913244479832f04c44cd77ffc9293 (diff) | |
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
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_info.c | 4 |
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 036cd275c53e..e84faecf5225 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -199,7 +199,6 @@ static int drm_open_helper(struct file *filp, struct drm_minor *minor) filp->private_data = priv; priv->filp = filp; - priv->uid = current_euid(); priv->pid = get_pid(task_pid(current)); priv->minor = minor; diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c index 9ae353f4dd06..1df2d33d0b40 100644 --- a/drivers/gpu/drm/drm_info.c +++ b/drivers/gpu/drm/drm_info.c @@ -80,6 +80,7 @@ int drm_clients_info(struct seq_file *m, void *data) struct drm_info_node *node = (struct drm_info_node *) m->private; struct drm_device *dev = node->minor->dev; struct drm_file *priv; + kuid_t uid; seq_printf(m, "%20s %5s %3s master a %5s %10s\n", @@ -98,13 +99,14 @@ 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 = 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), priv->minor->index, drm_is_current_master(priv) ? 'y' : 'n', priv->authenticated ? 'y' : 'n', - from_kuid_munged(seq_user_ns(m), priv->uid), + from_kuid_munged(seq_user_ns(m), uid), priv->magic); rcu_read_unlock(); } |