On Tue, 9 Mar 2004, Russell King wrote:
> On Tue, Mar 09, 2004 at 10:53:57AM +0100, Jaroslav Kysela wrote:
> > On Tue, 9 Mar 2004, Gupta, Kshitij wrote:
> > > > Can someone comment on this and guide a little bit to solve this problem.
> >
> > Yes, on ARM platform you might have problem with MMU / cache coherency,
> > because appl_ptr and hw_ptr are mmaped to user space. I observed this
> > behaviour on SA11xx platform, too.
> >
> > Russell King already notified us about this problem. See the mail archive
> > for the proper fix of the midlevel code.
>
> There currently doesn't exist a public fix for this yet, so people using
> ARM platforms will have to live without ALSA for the time being.
> (Actually, you can still use ALSA but you must use OSS PCM emulation.)
Ok, I though that vma->vm_page_prot fix is sufficient for this purpose but
appearently not.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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