nfsd4: fix null dereference creating nfsv4 callback client

[safe/jmp/linux-2.6] / include / linux / async_tx.h

diff --git a/include/linux/async_tx.h b/include/linux/async_tx.h
index bdca3f1..5fc2ef8 100644 (file)
--- a/include/linux/async_tx.h
+++ b/include/linux/async_tx.h
@@ -21,6 +21,15 @@
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 
+/* on architectures without dma-mapping capabilities we need to ensure
+ * that the asynchronous path compiles away
+ */
+#ifdef CONFIG_HAS_DMA
+#define __async_inline
+#else
+#define __async_inline __always_inline
+#endif
+
 /**
  * dma_chan_ref - object used to manage dma channels received from the
  *   dmaengine core.
@@ -47,7 +56,6 @@ struct dma_chan_ref {
  * address is an implied source, whereas the asynchronous case it must be listed
  * as a source.  The destination address must be the first address in the source
  * array.
- * @ASYNC_TX_ASSUME_COHERENT: skip cache maintenance operations
  * @ASYNC_TX_ACK: immediately ack the descriptor, precludes setting up a
  * dependency chain
  * @ASYNC_TX_DEP_ACK: ack the dependency descriptor.  Useful for chaining.
@@ -55,40 +63,31 @@ struct dma_chan_ref {
 enum async_tx_flags {
        ASYNC_TX_XOR_ZERO_DST    = (1 << 0),
        ASYNC_TX_XOR_DROP_DST    = (1 << 1),
-       ASYNC_TX_ASSUME_COHERENT = (1 << 2),
        ASYNC_TX_ACK             = (1 << 3),
        ASYNC_TX_DEP_ACK         = (1 << 4),
 };
 
 #ifdef CONFIG_DMA_ENGINE
-void async_tx_issue_pending_all(void);
-enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
-void async_tx_run_dependencies(struct dma_async_tx_descriptor *tx);
+#define async_tx_issue_pending_all dma_issue_pending_all
+#ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL
+#include <asm/async_tx.h>
+#else
+#define async_tx_find_channel(dep, type, dst, dst_count, src, src_count, len) \
+        __async_tx_find_channel(dep, type)
 struct dma_chan *
-async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
+__async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
        enum dma_transaction_type tx_type);
+#endif /* CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL */
 #else
 static inline void async_tx_issue_pending_all(void)
 {
        do { } while (0);
 }
 
-static inline enum dma_status
-dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
-{
-       return DMA_SUCCESS;
-}
-
-static inline void
-async_tx_run_dependencies(struct dma_async_tx_descriptor *tx,
-       struct dma_chan *host_chan)
-{
-       do { } while (0);
-}
-
 static inline struct dma_chan *
 async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
-       enum dma_transaction_type tx_type)
+       enum dma_transaction_type tx_type, struct page **dst, int dst_count,
+       struct page **src, int src_count, size_t len)
 {
        return NULL;
 }
@@ -96,21 +95,14 @@ async_tx_find_channel(struct dma_async_tx_descriptor *depend_tx,
 
 /**
  * async_tx_sync_epilog - actions to take if an operation is run synchronously
- * @flags: async_tx flags
- * @depend_tx: transaction depends on depend_tx
  * @cb_fn: function to call when the transaction completes
  * @cb_fn_param: parameter to pass to the callback routine
  */
 static inline void
-async_tx_sync_epilog(unsigned long flags,
-       struct dma_async_tx_descriptor *depend_tx,
-       dma_async_tx_callback cb_fn, void *cb_fn_param)
+async_tx_sync_epilog(dma_async_tx_callback cb_fn, void *cb_fn_param)
 {
        if (cb_fn)
                cb_fn(cb_fn_param);
-
-       if (depend_tx && (flags & ASYNC_TX_DEP_ACK))
-               async_tx_ack(depend_tx);
 }
 
 void
@@ -147,4 +139,6 @@ struct dma_async_tx_descriptor *
 async_trigger_callback(enum async_tx_flags flags,
        struct dma_async_tx_descriptor *depend_tx,
        dma_async_tx_callback cb_fn, void *cb_fn_param);
+
+void async_tx_quiesce(struct dma_async_tx_descriptor **tx);
 #endif /* _ASYNC_TX_H_ */