op 23-04-14 13:15, Maarten Lankhorst schreef:
This adds 4 more 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() is added because touching the fence_excl member directly will trigger a sparse warning.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@canonical.com
Using seqcount and fixing some lockdep bugs. Changes since v2:
- Fix some crashes, remove some unneeded barriers when provided by seqcount writes
- Fix code to work correctly with sparse's RCU annotations.
- Create a global string for the seqcount lock to make lockdep happy.
Can I get this version reviewed? If it looks correct I'll mail the full series because it's intertwined with the TTM conversion to use this code.
Ping, can anyone review this?