Hi Nemoto-san,

On Fri, 25 Jul 2008, Atsushi Nemoto wrote:

On Thu, 17 Jul 2008 21:16:36 +0200, Geert Uytterhoeven [off-list ref] wrote:

quoted

 	if (initrd_start && !initrd_below_start_ok &&
-			initrd_start < min_low_pfn << PAGE_SHIFT) {
+	    page_to_pfn(virt_to_page(initrd_start)) < min_low_pfn) {
 		printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
-		    "disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
+		    "disabling it.\n",
+		    page_to_pfn(virt_to_page(initrd_start)), min_low_pfn);
 		initrd_start = 0;
 	}

This patch causes warnings on mips:

linux/init/main.c: In function 'start_kernel':
linux/init/main.c:633: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast
linux/init/main.c:636: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast

Because an argument of mips virt_to_phys() is an pointer and
initrd_start is unsigned long.  It seems most (all?) arch's
virt_to_phys() casts its argument to unsigned long internally.  Should
mips follow?

Alternatively, as initrd_start is really a virtual kernel address,
perhaps it should be changed from unsigned long to void * instead?

It's cast to `void *' in several place. arch/xtensa/kernel/setup.c even
has `extern void *initrd_start' to fool around this?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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