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drm/sysfs: Annote lockless show functions with READ_ONCE

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For documentation and paranoia.

Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331120-27864-4-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-03-30 11:45:13 +02:00
parent 5ff18e42dd
commit 4eb9b945c6
1 changed files with 8 additions and 3 deletions
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11
drivers/gpu/drm/drm_sysfs.c
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@ -208,9 +208,12 @@ 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,
@ -231,9 +234,11 @@ static ssize_t enabled_show(struct device *device,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
bool enabled;
return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" :
"disabled");
enabled = READ_ONCE(connector->encoder);
return snprintf(buf, PAGE_SIZE, enabled ? "enabled\n" : "disabled\n");
}
static ssize_t edid_show(struct file *filp, struct kobject *kobj,