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| author | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:14 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:14 -0700 |
| commit | 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 (patch) | |
| tree | b7b72d02a993ff2ba731d6608f4ab8ce87482bcb /include/linux/dmaengine.h | |
| parent | bec085134e446577a983f17f57d642a88d1af53b (diff) | |
| download | op-kernel-dev-2ba05622b8b143b0c95968ba59bddfbd6d2f2559.zip op-kernel-dev-2ba05622b8b143b0c95968ba59bddfbd6d2f2559.tar.gz | |
dmaengine: provide a common 'issue_pending_all' implementation
async_tx and net_dma each have open-coded versions of issue_pending_all,
so provide a common routine in dmaengine.
The implementation needs to walk the global device list, so implement
rcu to allow dma_issue_pending_all to run lockless. Clients protect
themselves from channel removal events by holding a dmaengine reference.
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dmaengine.h')
| -rw-r--r-- | include/linux/dmaengine.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index b466f02..57a43ad 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -471,6 +471,7 @@ int dma_async_device_register(struct dma_device *device); void dma_async_device_unregister(struct dma_device *device); void dma_run_dependencies(struct dma_async_tx_descriptor *tx); struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type); +void dma_issue_pending_all(void); /* --- Helper iov-locking functions --- */ |
