[PATCH 1/3] drm/sysfs: Annote lockless show functions with READ_ONCE

[Daniel Vetter]

For documentation and paranoia.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/drm_sysfs.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 615b7e667320..7506de0a75b4 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -220,9 +220,12 @@ static ssize_t status_show(struct device *device,
                           char *buf)
 {
        struct drm_connector *connector = to_drm_connector(device);
+       enum drm_connector_status status;
+
+       status = READ_ONCE(connector->status);

        return snprintf(buf, PAGE_SIZE, "%s\n",
-                       drm_get_connector_status_name(connector->status));
+                       drm_get_connector_status_name(status));
 }

 static ssize_t dpms_show(struct device *device,
@@ -243,9 +246,11 @@ static ssize_t enabled_show(struct device *device,
                           char *buf)
 {
        struct drm_connector *connector = to_drm_connector(device);
+       bool enabled;
+
+       enabled = READ_ONCE(connector->encoder);

-       return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" :
-                       "disabled");
+       return snprintf(buf, PAGE_SIZE, enabled ? "enabled\n" : "disabled\n");
 }

 static ssize_t edid_show(struct file *filp, struct kobject *kobj,
-- 
2.5.1