kernel-ark/drivers/dma-buf
Maarten Lankhorst 3c3b177a93 reservation: add suppport for read-only access using rcu
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 <maarten.lankhorst@canonical.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-By: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-08 13:41:08 -07:00
..
dma-buf.c reservation: add suppport for read-only access using rcu 2014-07-08 13:41:08 -07:00
fence.c reservation: add suppport for read-only access using rcu 2014-07-08 13:41:08 -07:00
Makefile seqno-fence: Hardware dma-buf implementation of fencing (v6) 2014-07-08 12:50:59 -07:00
reservation.c reservation: add suppport for read-only access using rcu 2014-07-08 13:41:08 -07:00
seqno-fence.c seqno-fence: Hardware dma-buf implementation of fencing (v6) 2014-07-08 12:50:59 -07:00