Re: 2.6.22-rc2 built on ppc
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: 2007-05-20 16:02:01
I wrote:
The allegedly unused variables are used in calls to dma_unmap_single(), but only for these calls.
and a call to dma_unmap_sg().
On PPC32, you get
/* We do nothing. */
#define dma_unmap_single(dev, addr, size, dir) ((void)0)
in dma-mapping.h. This is also the case for Linux 2.6.20.
But in Linux 2.6.19 and older, it was
/* We do nothing. */
#define dma_unmap_single(dev, addr, size, dir) do { } while (0)...
I don't know what's to blame for the warnings --- new gcc versions or
the change from do { } while (0) to ((void)0)?... Ditto for dma_unmap_sg(). -- Stefan Richter -=====-=-=== -=-= =-=-- http://arcgraph.de/sr/