svn commit: r217330 - head/sys/x86/x86

[John Baldwin]

On Wednesday, January 12, 2011 4:08:50 pm Matthew D Fleming wrote:
> Author: mdf
> Date: Wed Jan 12 21:08:49 2011
> New Revision: 217330
> URL: http://svn.freebsd.org/changeset/base/217330
> 
> Log:
>   Fix a brain fart.  Since this file is shared between i386 and amd64, a
>   bus_size_t may be 32 or 64 bits.  Change the bounce_zone alignment field
>   to explicitly be 32 bits, as I can't really imagine a DMA device that
>   needs anything close to 2GB alignment of data.

Hmm, we do have devices with 4GB boundaries though.  I think I'd prefer it if 
you instead if you did this:

#if defined(amd64) || defined(PAE)
#define	SYSCTL_ADD_BUS_SIZE_T		SYSCTL_ADD_UQUAD
#else
#define	SYSCTL_ADD_BUS_SIZE_T		SYSCTL_ADD_UINT
#endif

and then just used SYSCTL_ADD_BUS_SIZE_T() in the code so we could let the 
members in the bounce zone retain the same types passed to 
bus_dma_tag_create().

-- 
John Baldwin