drm/syncobj: make lockdep complain on WAIT_FOR_SUBMIT v3
DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT can't be used when we hold locks since we are basically waiting for userspace to do something. Holding a lock while doing so can trivial deadlock with page faults etc... So make lockdep complain when a driver tries to do this. v2: Add lockdep_assert_none_held() macro. v3: Add might_sleep() and also use lockdep_assert_none_held() in the IOCTL path. Signed-off-by:Christian König <christian.koenig@amd.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patchwork.freedesktop.org/patch/414944/
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f987c9e0
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