kernel.git/drivers/dma-buf/dma-buf.c, branch linux-3.17.y

reservation: add suppport for read-only access using rcu

2014-07-08T20:41:08Z

This adds some extra functions to deal with rcu. reservation_object_get_fences_rcu() will obtain the list of shared and exclusive fences without obtaining the ww_mutex. reservation_object_wait_timeout_rcu() will wait on all fences of the reservation_object, without obtaining the ww_mutex. reservation_object_test_signaled_rcu() will test if all fences of the reservation_object are signaled without using the ww_mutex. reservation_object_get_excl and reservation_object_get_list require the reservation object to be held, updating requires write_seqcount_begin/end. If only the exclusive fence is needed, rcu_dereference followed by fence_get_rcu can be used, if the shared fences are needed it's recommended to use the supplied functions. Signed-off-by: Maarten Lankhorst Acked-by: Sumit Semwal Acked-by: Daniel Vetter Reviewed-By: Thomas Hellstrom Signed-off-by: Greg Kroah-Hartman

reservation: update api and add some helpers

2014-07-08T20:37:35Z

Move the list of shared fences to a struct, and return it in reservation_object_get_list(). Add reservation_object_get_excl to get the exclusive fence. Add reservation_object_reserve_shared(), which reserves space in the reservation_object for 1 more shared fence. reservation_object_add_shared_fence() and reservation_object_add_excl_fence() are used to assign a new fence to a reservation_object pointer, to complete a reservation. Changes since v1: - Add reservation_object_get_excl, reorder code a bit. Signed-off-by: Maarten Lankhorst Acked-by: Sumit Semwal Acked-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman

dma-buf: add poll support, v3

2014-07-08T20:36:52Z

Thanks to Fengguang Wu for spotting a missing static cast. v2: - Kill unused variable need_shared. v3: - Clarify the BUG() in dma_buf_release some more. (Rob Clark) Signed-off-by: Maarten Lankhorst Acked-by: Sumit Semwal Acked-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman

dma-buf: use reservation objects

2014-07-08T20:03:20Z

This allows reservation objects to be used in dma-buf. it's required for implementing polling support on the fences that belong to a dma-buf. Signed-off-by: Maarten Lankhorst Acked-by: Mauro Carvalho Chehab #drivers/media/v4l2-core/ Acked-by: Thomas Hellstrom #drivers/gpu/drm/ttm Acked-by: Sumit Semwal Acked-by: Daniel Vetter Signed-off-by: Vincent Stehlé #drivers/gpu/drm/armada/ Signed-off-by: Greg Kroah-Hartman

dma-buf: move to drivers/dma-buf

2014-07-08T17:51:06Z

Signed-off-by: Maarten Lankhorst Acked-by: Sumit Semwal Acked-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman