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| author | Maarten Lankhorst | 2014-07-01 12:58:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2014-07-08 22:41:08 +0200 |
| commit | 3c3b177a9369b26890ced004867fb32708e8ef5b (patch) | |
| tree | d7f1840cd62b8c0d427ea56b203485c2e27bb29e /drivers/dma-buf/fence.c | |
| parent | reservation: update api and add some helpers (diff) | |
| download | kernel-qcow2-linux-3c3b177a9369b26890ced004867fb32708e8ef5b.tar.gz kernel-qcow2-linux-3c3b177a9369b26890ced004867fb32708e8ef5b.tar.xz kernel-qcow2-linux-3c3b177a9369b26890ced004867fb32708e8ef5b.zip | |
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>
Diffstat (limited to 'drivers/dma-buf/fence.c')
| -rw-r--r-- | drivers/dma-buf/fence.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c index 948bf00d955e..4222cb2aa96a 100644 --- a/drivers/dma-buf/fence.c +++ b/drivers/dma-buf/fence.c @@ -184,7 +184,7 @@ EXPORT_SYMBOL(fence_release); void fence_free(struct fence *fence) { - kfree(fence); + kfree_rcu(fence, rcu); } EXPORT_SYMBOL(fence_free); |