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dmaengine: remove dependency on async_tx

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async_tx.ko is a consumer of dma channels.  A circular dependency arises
if modules in drivers/dma rely on common code in async_tx.ko.  It
prevents either module from being unloaded.

Move dma_wait_for_async_tx and async_tx_run_dependencies to dmaeninge.o
where they should have been from the beginning.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-01-05 17:14:31 -07:00
parent 28405d8d9c
commit 07f2211e4f
7 changed files with 95 additions and 96 deletions
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15
include/linux/async_tx.h
View file

@ -60,8 +60,6 @@ enum async_tx_flags {
#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);
#ifdef CONFIG_ARCH_HAS_ASYNC_TX_FIND_CHANNEL
#include <asm/async_tx.h>
#else
@ -77,19 +75,6 @@ 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, struct page **dst, int dst_count,