Accessing flash directly from User Space [SOLVED]

[Jonathan Haws]

> On Friday 30 October 2009 16:08:55 Alessandro Rubini wrote:
> > > asm("eieio; sync");
> >
> > Hmm...
> > 	: : : "memory"
> >
> > And, doesn't ";" start a comment in assembly? (no, not on powerpc
> it seems)
> 
> Yes, I think the barrier is wrong.
> Please try with
> 
> #define mb()	__asm__ __volatile__("eieio\n sync\n" : : :
> "memory")

That definition worked great.  I must have missed the : : : "memory" bit when I was digging through code.

Thanks, that gives me about a 2x speedup over the msync() calls.

Thanks for the help!