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authorDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:14 -0700
committerDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:14 -0700
commit2ba05622b8b143b0c95968ba59bddfbd6d2f2559 (patch)
treeb7b72d02a993ff2ba731d6608f4ab8ce87482bcb /include
parentbec085134e446577a983f17f57d642a88d1af53b (diff)
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')
-rw-r--r--include/linux/async_tx.h2
-rw-r--r--include/linux/dmaengine.h1
2 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h
index 1c816775f135..45f6297821bd 100644
--- a/include/linux/async_tx.h
+++ b/include/linux/async_tx.h
@@ -59,7 +59,7 @@ enum async_tx_flags {
};
#ifdef CONFIG_DMA_ENGINE
-void async_tx_issue_pending_all(void);
+#define async_tx_issue_pending_all dma_issue_pending_all
#ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL
#include <asm/async_tx.h>
#else
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index b466f02e2433..57a43adfc39e 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 --- */