[U-Boot] About the volatile data type in include/net.h

[Mike Frysinger]

On Monday 21 November 2011 22:06:37 Macpaul Lin wrote:
> I have found there are some variables declared as volatile in
> include/net.h. Some of them are used as in send and receive functions.
> Since some of them seems won't be update by hardware, like sending
> functions. Should we check and clean them up?
> 
> For example, the send function in eth_device has a volatile type
> points to buffer.

we should be able to drop the volatile markings on the packet buffers.  i 
imagine it dates back to when cache/dma wasn't handled properly, so making all 
of the accesses hit the external memory made things work "better".

drivers should be fixed to properly flush any packets before sending them out to 
the peripherals via dma.
-mike
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20111123/e1bc5c92/attachment.pgp>