* Woodruff, Richard <r-woodruff2@xxxxxx> [050609 10:59]:
> If you don't have CONFIG_DISCONTIGMEM support enabled, this used to just
> map to a simple macro.
>
> 0xc1c8c000-0xc0000000+0x10000000 = 11c8c000
>
> There should be another layer of indirection if CONFIG_DISCONTIGMEM
> support is turned on which needs to be defined properly. Do you have
> that enabled by chance?
> > open-source-bounces@xxxxxxxxxxxxxx] On Behalf Of Tim Bird
> >
> > I'm trying to use virt_to_phys() to find the physical address
> > of some kernel RAM. (This is an on ARM OSK board).
> > It's not working as I expected:
> >
> > membase = kmalloc(DEBUG_MEM_LENGTH, GFP_ATOMIC);
> > physbase = virt_to_phys(membase);
> > printk("membase=0x%p\n", membase);
> > printk("physbase=0x%lu\n", physbase);
> >
> > Gives me:
> > membase=0xc1c8c000
> > physbase=0x298369024
> >
> > physbase isn't in the range of real physical memory on my
> > machine. (I'm only interested in the first page of the
> > allocation, so I don't care if subsequent pages are
> > not physically contiguous.)
It should work, otherwise the memory would not work :)
How about trying printk with 0x%lx instead?
Tony
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