Re: [PATCH] initrd: Fix virtual/physical mix-up in overwrite test

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, 18 Dec 2007, Andrew Morton wrote:
> On Sun, 16 Dec 2007 11:51:00 +0100 (CET) Geert Uytterhoeven <[email protected]> wrote:
> > On recent kernels, I get the following error when using an initrd:
> > 
> > | initrd overwritten (0x00b78000 < 0x07668000) - disabling it.
> > 
> > My Amiga 4000 has 12 MiB of RAM at physical address 0x07400000 (virtual
> > 0x00000000).
> > The initrd is located at the end of RAM: 0x00b78000 - 0x00c00000 (virtual).
> > The overwrite test compares the (virtual) initrd location to the (physical)
> > first available memory location, which fails.
> > 
> > This patch converts initrd_start to a page frame number, so it can be safely
> > compared with min_low_pfn.
> > 
> > Before the introduction of discontiguous memory support on m68k
> > (12d810c1b8c2b913d48e629e2b5c01d105029839), min_low_pfn was just left
> > untouched by the m68k-specific code (zero, I guess), and everything worked
> > fine.
> 
> breaks x86.
> 
> init/main.c: In function 'start_kernel':
> init/main.c:601: error: implicit declaration of function 'virt_to_pfn'
> init/main.c:603: warning: format '%08lx' expects type 'long unsigned int', but argument 2 has type 'int'

Interestingly, virt_to_pfn() exists on a few architectures only :-(

So what's the correct portable construct to use instead?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux