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SubjectRe: [patch 29/29] initrd: Fix virtual/physical mix-up in overwrite test
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On Thu, 17 Jul 2008 21:16:36 +0200, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> 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?

---
Atsushi Nemoto

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