Re: Accessing shared physical memory
Chris Wedgwood (cw@f00f.org)
Sat, 13 Nov 1999 14:15:48 +1300
On Thu, Nov 11, 1999 at 06:50:23PM +0000, Alan Cox wrote:
> > Access from a driver that does:
> >
> > ptr = (short *) ioremap(0xd0000, 0x10000);
> > for(;;)
> > *ptr = 0xdead;
> >
> > Does not ever produce address 0xD... anything on the ISA bus. Therefore,
>
> Well I would guess the compiler optimised the above to
>
> while(1);
if the ptr is/was declared volatile (it's not), surely it won't do
this?
-cw
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