From: Guennadi Liakhovetski Date: Wed, 22 Dec 2010 13:46:46 +0000 (+0100) Subject: dmaengine: provide dummy functions for DMA_ENGINE=n X-Git-Tag: MMI-PSA29.97-13-9~21475^2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8f33d5277fada0291ea495f7fd44a3e7b7aa41d3;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git dmaengine: provide dummy functions for DMA_ENGINE=n This lets drivers, optionally using the dmaengine, build with DMA_ENGINE unselected. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Dan Williams --- diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 9d8688b92d8b..8cd00ad98d37 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -824,6 +824,8 @@ enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); #ifdef CONFIG_DMA_ENGINE enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx); void dma_issue_pending_all(void); +struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param); +void dma_release_channel(struct dma_chan *chan); #else static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) { @@ -831,7 +833,14 @@ static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descript } static inline void dma_issue_pending_all(void) { - do { } while (0); +} +static inline struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, + dma_filter_fn fn, void *fn_param) +{ + return NULL; +} +static inline void dma_release_channel(struct dma_chan *chan) +{ } #endif @@ -842,8 +851,6 @@ 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); #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) -struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param); -void dma_release_channel(struct dma_chan *chan); /* --- Helper iov-locking functions --- */