diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-03-17 20:20:27 +0000 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-03-29 13:51:49 +0300 |
| commit | 43dc7fe2b2118c76fbc2808dec0c57b3158e6dc0 (patch) | |
| tree | 7259066e9a9a9a7ea41c81f5b637484459ab0c51 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 75cff0837c14eaf632efabb8d7ab9eec6394d20d (diff) | |
drm: Mark up accesses of vblank->enabled outside of its spinlock
Order the update to vblank->enabled after the timestamp is primed so
that a concurrent unlocked reader will only see the vblank->enabled with
the current timestamp.
v2: vblank->enable is guarded by dev->vbl_lock not
dev->vblank_time_lock, update the READ_ONCE accordingly.
Do not add a READ_ONCE(vblank->enabled) inside the interrupt handler to
avoid missing an interrupt whilst racing with enable_vblank()
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170317202030.24410-1-chris@chris-wilson.co.uk
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions