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| /openbmc/linux/drivers/gpu/drm/ |
| H A D | drm_crtc.c | b62584e3 Tue Dec 11 09:51:35 CST 2012 Daniel Vetter <daniel.vetter@ffwll.ch> drm: optimize drm_framebuffer_remove
Now that all framebuffer usage is properly refcounted, we are no
longer required to hold the modeset locks while dropping the last
reference. Hence implemented a fastpath which avoids the potential
stalls associated with grabbing mode_config.lock for the case where
there's no other reference around.
Explain in a big comment why it is safe. Also update kerneldocs with
the new locking rules around drm_framebuffer_remove.
Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
b62584e3 Tue Dec 11 09:51:35 CST 2012 Daniel Vetter <daniel.vetter@ffwll.ch> drm: optimize drm_framebuffer_remove
Now that all framebuffer usage is properly refcounted, we are no
longer required to hold the modeset locks while dropping the last
reference. Hence implemented a fastpath which avoids the potential
stalls associated with grabbing mode_config.lock for the case where
there's no other reference around.
Explain in a big comment why it is safe. Also update kerneldocs with
the new locking rules around drm_framebuffer_remove.
Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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