On Tue, 18 Dec 2007 20:52:07 +0100 (CET) Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
On Tue, 18 Dec 2007, Andrew Morton wrote:
On Sun, 16 Dec 2007 11:51:00 +0100 (CET) Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> 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?
I guess page_to_pfn(virt_to_page(addr))?
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