mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
dmaengine: kill tx_list
The tx_list attribute of struct dma_async_tx_descriptor is common to most, but not all dma driver implementations. None of the upper level code (dmaengine/async_tx) uses it, so allow drivers to implement it locally if they need it. This saves sizeof(struct list_head) bytes for drivers that do not manage descriptors with a linked list (e.g.: ioatdma v2,3). Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
parent
1979b186b8
commit
0803172778
2 changed files with 0 additions and 4 deletions
|
@ -933,7 +933,6 @@ void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx,
|
|||
{
|
||||
tx->chan = chan;
|
||||
spin_lock_init(&tx->lock);
|
||||
INIT_LIST_HEAD(&tx->tx_list);
|
||||
}
|
||||
EXPORT_SYMBOL(dma_async_tx_descriptor_init);
|
||||
|
||||
|
|
|
@ -180,8 +180,6 @@ typedef void (*dma_async_tx_callback)(void *dma_async_param);
|
|||
* @flags: flags to augment operation preparation, control completion, and
|
||||
* communicate status
|
||||
* @phys: physical address of the descriptor
|
||||
* @tx_list: driver common field for operations that require multiple
|
||||
* descriptors
|
||||
* @chan: target channel for this operation
|
||||
* @tx_submit: set the prepared descriptor(s) to be executed by the engine
|
||||
* @callback: routine to call after this operation is complete
|
||||
|
@ -195,7 +193,6 @@ struct dma_async_tx_descriptor {
|
|||
dma_cookie_t cookie;
|
||||
enum dma_ctrl_flags flags; /* not a 'long' to pack with cookie */
|
||||
dma_addr_t phys;
|
||||
struct list_head tx_list;
|
||||
struct dma_chan *chan;
|
||||
dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx);
|
||||
dma_async_tx_callback callback;
|
||||
|
|
Loading…
Reference in a new issue