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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-06-22 08:46:12 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-06-22 10:07:28 +0200 |
| commit | fa7d81bb3c269a2ee38b6e4d569d9eb8be1a78ad (patch) | |
| tree | a3c19e2d7dd2fe3b9c5f588b6adc5feaf9e38c1c /drivers/gpu/drm/drm_fb_helper.c | |
| parent | 366e292df678caed1fb3644989e6b5ae2333808c (diff) | |
| download | linux-fa7d81bb3c269a2ee38b6e4d569d9eb8be1a78ad.tar.gz | |
drm/fb-helper: Reduce READ_ONCE(master) to lockless_dereference
We are only documenting that the read is outside of the lock, and do not
require strict ordering on the operation. In this case the more relaxed
lockless_dereference() will suffice.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466581572-16608-1-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 0a06f9120b5a..ce54e985d91b 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -464,7 +464,7 @@ static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) /* Sometimes user space wants everything disabled, so don't steal the * display if there's a master. */ - if (READ_ONCE(dev->master)) + if (lockless_dereference(dev->master)) return false; drm_for_each_crtc(crtc, dev) { |